Description: Demi alliance en or gris, ornée d'une ligne de diamants brillantés en serti rail..
Poids brut: 3,50 g.
Notes: Jewellery or jewelry is a form of personal adornment, such as brooches,rings, necklaces, earrings, and bracelets.
Request more information
With some exceptions, such as medical alert bracelets or military dog tags, jewellery normally differs from other items of personal adornment in that it has no other purpose than to look appealing, but humans have been producing and wearing it for a long time - with 100,000-year-old beads made from Nassarius shells thought to be the oldest known jewellery.
Jewellery may be made from a wide range of materials, but gemstones, precious metals,beads and shells have been widely used. Depending on the culture and times jewellery may be appreciated as a status symbol, for its material properties, its patterns, or for meaningful symbols. Jewellery has been made to adorn nearly every body part, from hairpins to toe rings.
The word jewellery itself is derived from the word jewel, which was anglicized from the Old French "jouel", and beyond that, to the Latin word "jocale", meaning plaything.
Jewellery has been used for a number of reasons:
Currency, wealth display and storage,
Functional use (such as clasps, pins and buckles)
Symbolism (to show membership or status)
Protection (in the form of amulets and magical wards),
Most cultures have at some point had a practice of keeping large amounts of wealth stored in the form of jewellery. Numerous cultures move wedding dowries in the form of jewellery or create jewellery as a means to store or display coins. Alternatively, jewellery has been used as a currency or trade good; an example being the use of slave beads.
Many items of jewellery, such as brooches and buckles, originated as purely functional items, but evolved into decorative items as their functional requirement diminished.
Jewellery can also be symbolic of group membership, as in the case of the Christian crucifix or Jewish Star of David, or of status, as in the case of chains of office, or the Western practice of married people wearing a wedding ring.
Wearing of amulets and devotional medals to provide protection or ward off evil is common in some cultures; these may take the form of symbols (such as the ankh), stones, plants, animals, body parts (such as the Khamsa), or glyphs (such as stylised versions of the Throne Verse in Islamic art).
Although artistic display has clearly been a function of jewellery from the very beginning, the other roles described above tended to take primacy. It was only in the late 19th century, with the work of such masters as Peter Carl Fabergé and René Lalique, that art began to take primacy over function and wealth. This trend has continued into modern times, expanded upon by artists such as Robert Lee Morris, Ed Levin, and Alberto Repossi.
In creating jewellery, gemstones, coins, or other precious items are often used, and they are typically set into precious metals. Alloys of nearly every metal known have been encountered in jewellery. Bronze, for example, was common in Roman times. Modern fine jewellery usually includes gold, white gold, platinum, palladium, titanium, or silver. Most American and European gold jewellery is made of an alloy of gold, the purity of which is stated in karats, indicated by a number followed by the letter K. American gold jewellery must be of at least 10K purity (41.7% pure gold), (though in the UK the number is 9K (37.5% pure gold) and is typically found up to 18K (75% pure gold). Higher purity levels are less common with alloys at 22 K (91.6% pure gold), and 24 K (99.9% pure gold) being considered too soft for jewellery use in America and Europe. These high purity alloys, however, are widely used across Asia, the Middle East and Africa. Platinum alloys range from 900 (90% pure) to 950 (95.0% pure). The silver used in jewellery is usually sterling silver, or 92.5% fine silver. In costume jewellery, stainless steel findings are sometimes used.
Other commonly used materials include glass, such as fused-glass or enamel; wood, often carved or turned; shells and other natural animal substances such as bone and ivory; natural clay; polymer clay; and even plastics. Hemp and other twines have been used as well to create jewellery that has more of a natural feel. However, any inclusion of lead or lead solder will cause an English Assay office (the building which gives English jewellery its stamp of approval, the Hallmark) to destroy the piece.Beads are frequently used in jewellery. These may be made of glass, gemstones, metal, wood, shells, clay and polymer clay. Beaded jewellery commonly encompasses necklaces, bracelets, earrings, belts and rings. Beads may be large or small; the smallest type of beads used are known as seed beads, these are the beads used for the "woven" style of beaded jewellery. Another use of seed beads is an embroidery technique where seed beads are sewn onto fabric backings to create broad collar neck pieces and beaded bracelets. Bead embroidery, a popular type of handwork during the Victorian era, is enjoying a renaissance in modern jewellery making. Beading, or beadwork, is also very popular in many African and indigenous North American cultures.
Advanced glass and glass beadmaking techniques by Murano and Venetian glassmasters developed crystalline glass, enamelled glass (smalto), glass with threads of gold (goldstone), multicoloured glass (millefiori), milk-glass (lattimo), and imitation gemstones made of glass. As early as the 13th century, Murano glass and Murano beads were popular.
Silversmiths, goldsmiths, and lapidaries methods include forging, casting, soldering or welding, cutting, carving and "cold-joining" (using adhesives, staples and rivets to assemble parts).
Diamonds were first mined in India. Pliny may have mentioned them, although there is some debate as to the exact nature of the stone he referred to as Adamas; In 2005, Australia, Botswana, Russia and Canada ranked among the primary sources of gemstone diamond production.
The British crown jewels contain the Cullinan Diamond, part of the largest gem-quality rough diamond ever found (1905), at 3,106.75 carats (621.35 g).Now popular in engagement rings, this usage dates back to the marriage of Maximilian I to Mary of Burgundy in 1477.
Many precious and semiprecious stones are used for jewellery. Among them are:Amber
Amber, an ancient organic gemstone, is composed of tree resin that has hardened over time. The stone must be at least one million years old to be classified as amber, and some amber can be up to 120 million years old.
Amethyst has historically been the most prized gemstone in the quartz family. It is treasured for its purple hue, which can range in tone from light to dark.
Emeralds are one of the three main precious gemstones (along with rubies and sapphires) and are known for their fine green to bluish green colour. They have been treasured throughout history, and some historians report that the Egyptians mined emerald as early as 3500 BC.
Jade is most commonly associated with the colour green but can come in a number of other colours, as well. Jade is closely linked to Asian culture, history, and tradition, and is sometimes referred to as the stone of heaven.
Jasper is a gemstone of the chalcedony family that comes in a variety of colours. Often, jasper will feature unique and interesting patterns within the coloured stone. Picture jasper is a type of jasper known for the colours (often beiges and browns) and swirls in the stone's pattern.
Quartz refers to a family of crystalline gemstones of various colours and sizes. Among the well-known types of quartz are rose quartz (which has a delicate pink colour), and smoky quartz (which comes in a variety of shades of translucent brown). A number of other gemstones, such as Amethyst and Citrine, are also part of the quartz family. Rutilated quartz is a popular type of quartz containing needle-like inclusions.
Rubies are known for their intense red colour and are among the most highly valued precious gemstones. Rubies have been treasured for millennia. In Sanskrit, the word for ruby is ratnaraj, meaning king of precious stones.
The most popular form of sapphire is blue sapphire, which is known for its medium to deep blue colour and strong saturation. Fancy sapphires of various colours are also available. In the United States, blue sapphire tends to be the most popular and most affordable of the three major precious gemstones (emerald, ruby, and sapphire).
Turquoise is found in only a few places on earth, and the world's largest turquoise producing region is the southwest United States. Turquoise is prized for its attractive colour, most often an intense medium blue or a greenish blue, and its ancient heritage. Turquoise is used in a great variety of jewellery styles. It is perhaps most closely associated with southwest and Native American jewellery, but it is also used in many sleek, modern styles. Some turquoise contains a matrix of dark brown markings, which provides an interesting contrast to the gemstone's bright blue colour.
Some gemstones (like pearls, coral, and amber) are classified as organic, meaning that they are produced by living organisms. Others are inorganic, meaning that they are generally composed of and arise from minerals.
Some gems, for example, amethyst, have become less valued as methods of extracting and importing them have progressed. Some man-made gems can serve in place of natural gems, such as cubic zirconia, which can be used in place of diamond.
For platinum, gold, and silver jewellery, there are many techniques to create finishes. The most common are high-polish, satin/matte, brushed, and hammered. High-polished jewellery is by far the most common and gives the metal a highly reflective, shiny look. Satin, or matte finish reduces the shine and reflection of the jewellery and is commonly used to accentuate gemstones such as diamonds. Brushed finishes give the jewellery a textured look and are created by brushing a material (similar to sandpaper) against the metal, leaving "brush strokes." Hammered finishes are typically created by using a soft, rounded hammer and hammering the jewellery to give it a wavy texture.
Some jewellery is plated to give it a shiny, reflective look or to achieve a desired colour. Sterling silver jewellery may be plated with a thin layer of 0.999 fine silver (a process known as flashing) or may be plated with rhodium or gold. Base metal costume jewellery may also be plated with silver, gold, or rhodium for a more attractive finish.
Jewellery has been used to denote status. In ancient Rome, for instance, only certain ranks could wear rings; Later, sumptuary laws dictated who could wear what type of jewellery, again based on rank. Cultural dictates have also played a significant role. For example, the wearing of earrings by Western men was considered effeminate in the 19th century and early 20th century. More recently, the display of body jewellery, such as piercings, has become a mark of acceptance or seen as a badge of courage within some groups but is completely rejected in others. Likewise, hip hop culture has popularised the slang term bling-bling, which refers to ostentatious display of jewellery by men or women.
Conversely, the jewellery industry in the early 20th century launched a campaign to popularise wedding rings for men, which caught on, as well as engagement rings for men, which did not, going so far as to create a false history and claim that the practice had medieval roots. By the mid 1940s, 85% of weddings in the U.S. featured a double-ring ceremony, up from 15% in the 1920s. Religion has also played a role: Islam, for instance, considers the wearing of gold by men as a social taboo, and many religions have edicts against excessive display. In Christianity, the New Testament gives injunctions against the wearing of gold, in the writings of the apostles Paul and Peter. In Revelation 17, "the great whore" or false religious system, is depicted as being "decked with gold and precious stones and pearls, having a golden cup in her hand."
The modern jewellery movement began in the late 1940s at the end of World War II with a renewed interest in artistic and leisurely pursuits. The movement is most noted with works by Georg Jensen and other jewellery designers who advanced the concept of wearable art. The advent of new materials, such as plastics, Precious Metal Clay (PMC), and colouring techniques, has led to increased variety in styles. Other advances, such as the development of improved pearl harvesting by people such as Mikimoto Kōkichi and the development of improved quality artificial gemstones such as moissanite (a diamond simulant), has placed jewellery within the economic grasp of a much larger segment of the population.
The "jewellery as art" movement was spearheaded by artisans such as Robert Lee Morris and continued by designers such as Gill Forsbrook in the UK. Influence from other cultural forms is also evident. One example of this is bling-bling style jewellery, popularised by hip-hop and rap artists in the early 21st century, i.e. grills, a type of jewelry worn over the teeth.
The late 20th century saw the blending of European design with oriental techniques such as Mokume-gane. The following are innovations in the decades straddling the year 2000: "Mokume-gane, hydraulic die forming, anti-clastic raising, fold-forming, reactive metal anodising, shell forms, PMC, photoetching, and [use of] CAD/CAM."
Artisan jewellery continues to grow as both a hobby and a profession. With more than 17 United States periodicals about beading alone, resources, accessibility, and a low initial cost of entry continues to expand production of hand-made adornments. Some fine examples of artisan jewellery can be seen at The Metropolitan Museum of Art in New York City.
Art jewelry is created with a variety of materials, not just precious metals and gems. In the late 19th century, René Lalique revolutionized jewelry design through his emphasis on imagination and technical virtuosity over precious materials and the imitation of past styles. Additionally, he experimented with industrial techniques, plastic and glass.
Art jewelry should be compared to expressions of art in other media such as glass, wood, plastics and clay. Art jewelry however has not yet created such a large following and is a relatively small niche, where jewelry is mostly bought by collectors and museums.Though many consider art jewelry still part of crafts as opposed to real "Arts" (with its appropriate art critics) things are changing considerably, in particular in Germany. In the 1960s and 1970s the German Government and the commercial jewelry industry decided to foster and heavily support modern jewelry designers, and thus creating a new marketplace. They focused in particular on combined contemporary design with their goldsmithing tradition and jewelry making. At present art jewelry is no longer a niche market and many designers are sold in regular jewelry stores.An example of current trends in art jewelry is the use of modern synthetic materials such as polypropylene, nylon and acrylic. Art jewelers have developed techniques for using these materials to dramatic effect. One example of this is award winning jeweler Gill Forsbrook a designer working in the UK. Further notable makers and artists include Hermann Jünger, Swiss-born Pierre Degen, Caroline Broadhead, Naomi Filmer, Otto Kuenzli and Florian Ladstaetter .
Fashion labels such as Bless, Martin Margiela, Comme des Garcons, etc. have had a strong reference and input in the field of contemporary jewelry.
The acceptance of jewelry as art was fostered in the United States very quickly after World War II by major museums such as the Museum of Modern Art in New York and the Walker Art Center in Minneapolis, each of which held major shows of art jewelry in the 1940s. The Museum of Arts and Design formerly The American Craft Museum, started their collection in 1958 with pieces dating from the 1940s. Other museums whose collections include work by contemporary (American) jewelry designers include: the Cleveland Museum of Art, The Corning Museum of Glass, the Mint Museum of Craft & Design in Charlotte, NC, the Museum of Fine Arts, Boston, the Museum of Fine Arts, Houston, and the Renwick Gallery of the Smithsonian museum.
Some famous artists who created art jewelry in the past were Calder, Picasso, Man Ray, Meret Oppenheim, Dalí and Nevelson. Some of which represented at Sculpture to Wear Gallery in New York City which closed in 1977.
Artwear Gallery owned by Robert Lee Morris continued in this endeavor to showcase jewelry as an art form.
A collection of art jewelry can be found at the Schmuckmuseum in Pforzheim Germany.
A goldsmith is a metalworker who specializes in working with gold and other precious metals. Since ancient times the techniques of a goldsmith have evolved very little in order to produce items of jewelry of quality standards. In modern times actual goldsmiths are rare. Historically goldsmiths have also made flatware, platters, goblets, decorative and serviceable utensils, and ceremonial or religious items, but the rising prices of precious metals have curtailed the making of such items to a large degree.Goldsmiths must be skilled in forming metal through filing, soldering, sawing, forging, casting, and polishing metal. Traditionally, these skills had been passed along through apprenticeships, however, more recently Jewelry Arts Schools specializing solely in teaching goldsmithing and a multitude of skills falling under the jewelry arts umbrella are available. Many universities and junior colleges also offer goldsmithing, silversmithing and metal arts fabrication as a part of their fine arts curriculum.
Compared to other metals, gold is malleable, ductile, rare and it is the only metallic element with a yellow color; it is easily melted, fused and cast without the problems of oxides and gas that are problematic with bronzes, for example. It is fairly easy to "pressure weld", which is to say that two small pieces can be pounded together to make one larger piece, similar to clay. Gold is a noble metal- it does not react with most elements. That means it is usually found in its native form lasting indefinitely without oxidization and tarnishing.
Gold has been worked by humans in all cultures where the metal is available, either indigenously or imported, and the history of these activities is extensive. Superbly made objects from the ancient cultures of Europe, Africa, India, Asia, South America, Mesoamerica, and North America grace museums and collections around the world. Some pieces date back thousands of years and were made using many techniques that are still used by modern goldsmiths.In medieval Europe goldsmiths were organized in guilds and were usually one of the most important and wealthy of the guilds in a city. The guild kept records of members and the marks they used on their products. These records, when they survive, are very useful to historians. Goldsmiths often acted as bankers, since they dealt in gold and had sufficient security for the safe storage of valuable items. In the Middle Ages, goldsmithing normally included silversmithing as well, but the brass workers and workers in other base metals were normally in a separate guild since the trades were not allowed to overlap. Many jewelers were also goldsmiths. The Khudabadi Sindhi Swarankar community is one of the oldest communities in goldsmithing in India, whose superb gold artworks were displayed at The Great Exhibition of 1851 in London.The printmaking technique of engraving developed among goldsmiths in Germany around 1430, who had long used the technique on their metal pieces. The notable engravers of the 15th century were either goldsmiths, such as Master E. S., or the sons of goldsmiths, such as Martin Schongauer and Albrecht Dürer.
A goldsmith might have a wide array of skills and knowledge at their disposal. Gold, being the most malleable metal of all, offers unique opportunities for the worker. In today's world a wide variety of other metals, especially platinum alloys, may also be used extensively. 24 Carat is pure gold, and was historically known as fine gold. However, 24 Carat gold is rarely used, because it is so soft, so it is usually alloyed to make it stronger and create different colors; goldsmiths may have some skill in that process. Then the gold may be cast into some item, usually with the lost wax casting process, or it may be used to fabricate the work directly in metal.In the latter case, the goldsmith will use a variety of tools and machinery, including the rolling mill, the drawplate, and perhaps swage blocks and other forming tools to make the metal into shapes needed to build the intended piece. Then parts are fabricated through a wide variety of processes and assembled by soldering. It is a testament to the history and evolution of the trade that those skills have reached an extremely high level of attainment and skill over time. A fine goldsmith can and will work to a tolerance approaching that of precision machinery, but largely using only his eyes and hand tools. Quite often the goldsmith's job involves the making of mountings for gemstones, in which case they are often referred to as jewelers.'Jeweler' however is a term mostly reserved for a person who deals in jewellery (buys and sells) and not to be confused with a goldsmith, silversmith, gemologist, diamond cutter and diamond setters.
Household silver or silverware (the silver, the plate) includes dishware, cutlery and other household items made of sterling, Britannia or Sheffield plate silver. The term is often extended to items made of stainless steel. Silver is sometimes bought in sets or combined to form sets, such as a set of silver candlesticks or a silver tea service.Silver requires a good deal of care, as it tarnishes and must be hand polished, since careless or machine polishing ruins the patina and can completely erode the silver layer in Sheffield plate.
In a great house, the footmen cleaned and polished the silver, overseen by the butler who was responsible for it. In middle-income households the few items of silver or silverplate may be displayed on a buffet or in a cabinet or china cabinet or breakfront, but a larger collection of silver is usually locked away in a secure room or a special silver safe.A silverman or silver butler has expertise and professional knowledge of the management, secure storage, use and cleaning of all silverware, associated tableware and other paraphernalia for use at military and other special functions. This expertise covers the maintenance, cleaning and proper use and presentation of these assets to create aesthetically correct layouts for effective ambience at such splendid occasions. The role of silverman tends now to be restricted to some private houses and large organisations, in particular the military.
Holloware (or hollowware) is a term that refers to table service items such as sugar bowls, creamers, coffee pots, teapots, soup tureens, hot food covers, water pitchers, platters, butter pat plates and other metal items that went with the china on a table. It does not include flatware. Holloware was constructed to last a long time. It differs from some other silverplated items in being made with thicker walls and more layers of silverplate.
Dining car holloware is a type of railroad collectible (railroadiana). The relative value of pieces depends on their scarcity, age and condition, and the popularity of the trains the items were used on.
Holloware is the traditional gift in the UK and the modern gift in the US for the 16th wedding anniversary. Holloware is the traditional gift for jubilee or wedding in Russia.
Cutlery refers to any hand implement used in preparing, serving, and especially eating food in the Western world. It is more usually known as silverware or flatware in the United States, where cutlery usually means knives and related cutting instruments. This is probably the original meaning of the word. Since silverware suggests the presence of silver, the term tableware has come into use.The major items of cutlery in the Western world are the knife, fork and spoon. In recent times, utensils have been made combining the functionality of pairs of cutlery, including the spork (spoon / fork), spife (spoon / knife), and knork (knife / fork) or the sporf which is all three.
The word cutler derives from the Middle English word 'cuteler' and this in turn derives from Old French 'coutelier' which comes from 'coutel'; meaning knife (modern French: couteau).
Traditionally, good quality cutlery was made from silver (hence the U.S. name), though steel was always used for more utilitarian knives, and pewter was used for some cheaper items, especially spoons. From the nineteenth century, electroplated nickel silver (EPNS) was used as a cheaper substitute; nowadays, most cutlery, including quality designs, is made from stainless steel. Another alternative is melchior, a nickel and copper alloy, which can also sometimes contain manganese. It also contains elements of magnesium and copper sulphate.
Plastic cutlery is made for disposable use, and is frequently used outdoors (camping, excursions, and BBQs for instance), at fast-food or take-away outlets, or provided with airline meals.
English singer-songwriter Talis Kimberley wrote a song in reaction to the amount of plastic cutlery used. The song is called "Wash the damn spoon."
The first documented use of the term "cutler" in Sheffield appeared in a 1297 tax return. A Sheffield knife was listed in the King's possession in the Tower of London fifty years later. Several knives dating from the 14th century are on display at the Cutlers' Hall in Sheffield.Cutlery has been made in many places. In Britain the industry became concentrated by the late 16th century in and around Birmingham and Sheffield. However, the Birmingham industry increasingly concentrated on swords, made by "long cutlers", and on other edged tools, whereas the Sheffield industry concentrated on knives.At Sheffield the trade of cutler became divided, with allied trades such as razormaker, awlbladesmith, shearsmith and forkmaker emerging and becoming distinct trades by the 18th century.Before the mid 19th century when cheap mild steel became available due to new methods of steelmaking, knives (and other edged tools) were made by welding a strip of steel on to the piece of iron that was to be formed into a knife, or sandwiching a strip of steel between two pieces of iron. This was done because steel was then a much more expensive commodity than iron. Modern blades are sometimes laminated, but for a different reason. Since the hardest steel is brittle, a layer of hard steel may be laid between two layers of a milder, less brittle steel, for a blade that keeps a sharp edge well, and is less likely to break in service.
After fabrication, the knife had to be sharpened, originally on a grindstone, but from the late medieval period in a blade mill or (as they were known in the Sheffield region) a cutlers wheel.
Tableware is the dishes or dishware (ceramic), dinnerware (ceramics and other materials) used for setting a table, serving food, and for dining. Tableware can be meant to include flatware and glassware. The nature, variety, and number of objects varies from culture to culture, religions, and cuisines.
In the United States, tableware is most commonly referred to as dinnerware. Dinnerware can be meant to include glassware, however not flatware. In Britain, the term crockery is sometimes used for ceramic dishes. In the USA, ceramic dinnerware, whether made of porcelain or earthenware. Sets of dishes are often referred to as a table service or service set. Table settings or place settings are the dishes, flatware (cutlery), and glassware used by an individual for formal and informal dining. In the United Kingdom, silver service or butler service are names of methods for serving a meal.
The first known use of the term tableware was in 1766, dinnerware in 1895, and dishware in 1946.Dining culture in the United States
In 1880, Victorianism had established itself in the United States, with middle class Americans enjoying the materialism and consumption of goods to express their identities. The dining room or dining parlor, which had been in upper class houses since the colonial period of American history, became more common in middle-class homes. Dining became a social event with various food dishes being served with various manufactured tableware shapes. "The tools used for social dining changed dramatically over time, reflecting both changes in social life and the development of a tableware "fashion system." The manufacturers and marketers of china and glass wanted to sell more goods, the authors and publishers of books on entertaining sought to sell more copies; and the editors of tastemaking magazines pursued greater circulation and advertising revenues. They made table setting a distinctive fashion system of its own."
From 1920 to 1945, the United States saw the onset of casual dining as processed foods and changing food habits appeared. Women spent less time cooking. Casseroles, food dishes made with canned soups, etc., became popular and tableware makers added a new dish, the casserole dish, to their products lines. "Under the new regime of simplicity the well set table displayed the least number of pieces possible."
From 1945, after World War II, to 1960, the kitchen, no longer limited to the place where food was prepared, became a place to entertain and to dine with family and friends. Dinnerware sets were more informal in style, although a formal set of dinnerware or china was used for special occasions. After the 1960s until the 1980s, the formal dinner party returned as a "wave of gourmet culture" swept the United States with the introduction of Julia Child's television program, Mastering the Art of French Cooking. However, the excess of Victorianism was replaced by simplicity in the number of shapes and pieces used for dining.
Dishes are usually made of ceramic materials such as earthenware, stoneware, or porcelain, however can be made of other materials such as wood, pewter, silver, gold, glass, acrylic, and plastic. Dishes are purchased either by the piece or by set which include either four, eight, or twelve place settings.
Place setting dishes
Plates, such as service plates, dinner plates, lunch plates, desert plates, salad plates, or bread plates
Bowls, including soup bowls, cereal bowls, fruit bowls, cream soups, or dessert bowls
Individual covered casseroles or covered soups
Teacups, coffeecups, and Demitasse cups
Saucers, including teacup saucers, coffeecup saucers, demitasse saucers, and cream soup saucers.
Mugs, coffee or tea mugs, and chocolate mugs.
Salt and pepper shakers, salt cellars
Sugar bowl and creamer
Pitchers or Jugs: water, milk, juice, and syrup
Serving bowls including vegetable bowls and salad bowls
Casseroles or lidded serving bowls
Platters including chop plates, salvers, and trays
Charles Nicolas Odiot
Charles Norbert Roettiers