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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

Amethyst Geode Nodule, H: 35 1/4 in. (89.5 cm.)
Feb 27, 10:00 AM EST
Amethyst Geode Nodule, H: 35 1/4 in. (89.5 cm.)
by Weschler's
Est: $400- $600
$4259 Bids
PURPLE GEODE ROCK STONE LAPIDARY SPECIMEN
Feb 26, 1:00 PM CST
PURPLE GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$84 Bids
Brazilian Amethyst Geode
Mar 01, 9:00 AM MST
Brazilian Amethyst Geode
by Davis Brothers Auction
Est: $100- $150
$253 Bids
Natural History - Cut and Polished Agate Crystal Geode End Group [4].
Mar 09, 12:00 PM GMT
Natural History - Cut and Polished Agate Crystal Geode End Group [4].
by TimeLine Auctions
Est: £30- £40
£51 Bid
PURPLE GEODE ROCK STONE LAPIDARY SPECIMEN
Feb 26, 1:00 PM CST
PURPLE GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$51 Bid
PURPLE AND GOLD GEODE ROCK STONE LAPIDARY SPECIMEN
Feb 26, 1:00 PM CST
PURPLE AND GOLD GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$51 Bid
GEODE ROCK STONE LAPIDARY SPECIMEN
Feb 26, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$51 Bid
GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 23, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 23, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 23, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 08, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 08, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids
9 POUND CAVE GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 08, 1:00 PM CST
9 POUND CAVE GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 12, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 12, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 12, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 12, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids
CAVE GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 22, 1:00 PM CST
CAVE GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 22, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 22, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 22, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 22, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 22, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Jan 22, 1:00 PM CST
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$1000 Bids

Sellers Who Sell Geodes


Col. Christie Hatman, Auctioneer

Col. Christie Hatman, Auctioneer

TimeLine Auctions

TimeLine Auctions

Old Stuff For You

Old Stuff For You

Omni Auction Corp

Omni Auction Corp