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Geodes

Geodes demand centuries to be created and illustrate the marvelous feats possible in the natural world. Formed from cavities created by the consistent flow of water, geodes are an eternally entertaining geological formation for all ages from young children to seasoned adult connoisseurs.

A brilliant mineral manifestation, geodes form in the cavities of sedimentary or ingenious rock left behind by an air bubble. The shell of these stones is porous, and when water passes over them, the mineral content of that water can seep into the pores, leaving deposits in the interior void. Mineral crystals then slowly build over time, some taking thousands or even millions of years to form.

Resulting from this extended process is a breathtakingly beautiful network of crystals as sparkly as a gem-encrusted piece of jewelry. A perfect collectible for the geologist or gem lover, geodes are entrancing with their universal uniqueness.


Quick Facts

  • The Midwestern United States is one of the most abundant locations for harvesting geodes. The Warsaw Formation, which spans Illinois, Iowa, and Missouri, is renowned for its geode offerings
  • The most common colors of geodes are clear and amethyst purple. Less frequent are icy blue celestite, grey-yellow dolomite, and often multi-colored agate
  • The Empress of Uruguay is the world's largest recorded amethyst geode. Measuring more than 11 feet long and weighing 5,000 pounds, the Empress has been on display in Australia since 2007

Recommended Items at Auction

See all items

16in Amethyst Mineral Geode Cathedral
Dec 10, 10:00 AM MST
16in Amethyst Mineral Geode Cathedral
by EJ'S Auction & Appraisal
Est: $0- $0
$1605 Bids
15in Brazilian Amethyst Mineral Geode Cathedral
Dec 10, 10:00 AM MST
15in Brazilian Amethyst Mineral Geode Cathedral
by EJ'S Auction & Appraisal
Est: $0- $0
$1104 Bids
16in Brazilian Amethyst Mineral Geode Cathedral
Dec 10, 10:00 AM MST
16in Brazilian Amethyst Mineral Geode Cathedral
by EJ'S Auction & Appraisal
Est: $0- $0
$454 Bids
(9) Amethyst Cryptal Mineral Geodes
Dec 10, 10:00 AM MST
(9) Amethyst Cryptal Mineral Geodes
by EJ'S Auction & Appraisal
Est: $0- $0
$253 Bids
AMETHYST CRYSTAL GEODE. NATURAL MINERAL SPECIMEN.
Dec 07, 10:00 AM EST
AMETHYST CRYSTAL GEODE. NATURAL MINERAL SPECIMEN.
by Uniques & Antiques
Est: $150- $200
$1001 Bid
20.5 INCH TALL AMETHYST BRAZILIAN GEODES CHIMNEY. NATURAL MINERAL SPECIMEN.
Dec 07, 10:00 AM EST
20.5 INCH TALL AMETHYST BRAZILIAN GEODES CHIMNEY. NATURAL MINERAL SPECIMEN.
by Uniques & Antiques
Est: $200- $300
$1501 Bid
34 INCH TALL BRAZILIAN AMETHYST GEODE. AMETHYST CRYSTAL CHIMNEY. NATURAL MINERAL SPECIMEN.
Dec 07, 10:00 AM EST
34 INCH TALL BRAZILIAN AMETHYST GEODE. AMETHYST CRYSTAL CHIMNEY. NATURAL MINERAL SPECIMEN.
by Uniques & Antiques
Est: $300- $400
$2001 Bid
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 05, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$51 Bid
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 05, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 05, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 05, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 05, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$60 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 06, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 06, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 06, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 06, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 06, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 06, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 06, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 06, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 06, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 06, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 06, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Dec 06, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids

Sellers Who Sell Geodes


Col. Christie Hatman, Auctioneer

Col. Christie Hatman, Auctioneer

Uniques & Antiques

Uniques & Antiques

Lewis & Maese Auction Company

Lewis & Maese Auction Company

EJ'S Auction & Appraisal

EJ'S Auction & Appraisal