Loading Spinner

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

Large Amethyst Geode Rock Sculpture
Oct 30, 9:00 AM MST
Large Amethyst Geode Rock Sculpture
by Fidelity Estate Services
Est: $0- $0
$27511 Bids
Large Amethyst Geode Rock Sculpture
Oct 30, 9:00 AM MST
Large Amethyst Geode Rock Sculpture
by Fidelity Estate Services
Est: $0- $0
$18010 Bids
A crystal kit incl. rose quartz obelisk Ht. 17cm etc.
Oct 26, 6:00 PM AEDT
A crystal kit incl. rose quartz obelisk Ht. 17cm etc.
by Theodore Bruce
Est: AUD40- AUD60
AUD12010 Bids
LARGE AMETHYST QUARTZ CAVE GEODE
Oct 26, 6:00 PM PDT
LARGE AMETHYST QUARTZ CAVE GEODE
by O'Gallerie
Est: $400- $600
$7006 Bids
SMALL AMETHYST QUARTZ CAVE GEODE
Oct 25, 6:00 PM PDT
SMALL AMETHYST QUARTZ CAVE GEODE
by O'Gallerie
Est: $200- $300
$2754 Bids
AMETHYST ROCK STONE LAPIDARY SPECIMEN
Oct 22, 1:00 PM CDT
AMETHYST ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$283 Bids
Large Amethyst Geode Boulder Specimen
Oct 24, 12:00 PM EDT
Large Amethyst Geode Boulder Specimen
by Showplace
Est: $600- $800
$1252 Bids
Purple Amethyst Geode Cathedral Mineral Specimens
Nov 10, 2:00 PM EST
Purple Amethyst Geode Cathedral Mineral Specimens
by Hill Auction Gallery
Est: $100- $1,000
$502 Bids
Geode
Oct 30, 9:00 AM MST
Geode
by Fidelity Estate Services
Est: $0- $0
$51 Bid
GEODE ROCK STONE LAPIDARY SPECIMEN
Oct 22, 1:00 PM CDT
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$81 Bid
AMETHYST ROCK STONE LAPIDARY SPECIMEN
Oct 22, 1:00 PM CDT
AMETHYST ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$181 Bid
GRUPPO DI DODICI GEODI - GROUP OF TWELVE GEODES
Oct 21, 10:00 AM CEST
GRUPPO DI DODICI GEODI - GROUP OF TWELVE GEODES
by Aste Bolaffi
Est: €0- €0
€4000 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Oct 21, 1:00 PM CDT
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$80 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Oct 21, 1:00 PM CDT
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Oct 21, 1:00 PM CDT
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Oct 21, 1:00 PM CDT
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$80 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Oct 21, 1:00 PM CDT
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$80 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Oct 21, 1:00 PM CDT
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Oct 21, 1:00 PM CDT
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Oct 21, 1:00 PM CDT
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Oct 21, 1:00 PM CDT
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
GEODE ROCK STONE LAPIDARY SPECIMEN
Oct 21, 1:00 PM CDT
GEODE ROCK STONE LAPIDARY SPECIMEN
by Col. Christie Hatman, Auctioneer
Est: $0- $0
$50 Bids
CAVE GEODE ROCK STONE LAPIDARY SPECIMEN
Oct 21, 1:00 PM CDT
CAVE 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

Old Stuff For You

Old Stuff For You

Easterly Auction Company

Easterly Auction Company

Hill Auction Gallery

Hill Auction Gallery