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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... Read more

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Items in Geodes

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Assorted Uncracked Geode Rocks & Sliced Geodes

April 29, 2017, 10:00 AM MST
Glendale, AZ, USA

$35 (4 bids)

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Large Amethyst Geode

April 29, 2017, 10:00 AM MST
Glendale, AZ, USA

$85 (7 bids)

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Large Amethyst Crystal Geode Cathedral

April 29, 2017, 10:00 AM MST
Glendale, AZ, USA

$140 (12 bids)

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Septarian Nodule Geode

April 29, 2017, 10:00 AM MST
Glendale, AZ, USA

$45 (4 bids)

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A Lot of 3 Geos

April 29, 2017, 3:00 PM EST
Lakeland, FL, USA

$25 (starting bid)

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Top Quality Citrine Cathedral Geode

April 29, 2017, 5:00 PM CST
Chicago, IL, USA

$300 (starting bid)

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Unusual  Amethyist Cathedral Geode with Inclusions

April 29, 2017, 5:00 PM CST
Chicago, IL, USA

$500 (starting bid)

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Morrocan Fossiliferous Stone Jar with Cover

April 29, 2017, 5:00 PM CST
Chicago, IL, USA

$25 (starting bid)

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Museum Quality Amethyst Geode

April 29, 2017, 5:00 PM CST
Chicago, IL, USA

$500 (starting bid)

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Amethyst Cathedral Geode

April 29, 2017, 5:00 PM CST
Chicago, IL, USA

$125 (starting bid)

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Amethyst Cathedral Geode

April 29, 2017, 5:00 PM CST
Chicago, IL, USA

$125 (starting bid)

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Amethyst Cathedral Geode

April 29, 2017, 5:00 PM CST
Chicago, IL, USA

$150 (starting bid)

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12 Pcs. Amethyst

April 29, 2017, 5:00 PM CST
Chicago, IL, USA

$10 (starting bid)

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Amethyst Geode with Calcite Crystals

April 29, 2017, 5:00 PM CST
Chicago, IL, USA

$150 (starting bid)

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High Quality Amethyst   Cathedral Geode

April 29, 2017, 5:00 PM CST
Chicago, IL, USA

$100 (starting bid)

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GEODE PAIR

April 30, 2017, 1:00 PM EST
SARASOTA, FL, USA

$20 (starting bid)

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An Amethyst Geode with mining scene within

May 2, 2017, 10:00 AM BST
Exmouth, United Kingdom

£150 (starting bid)

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AMETHYST GEODE AND MINERALS BOX

May 3, 2017, 4:30 PM CET
Barcelona, Spain

€30 (starting bid)

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AMETHYST GEODE

May 3, 2017, 4:30 PM CET
Barcelona, Spain

€40 (starting bid)

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LARGE AMETHYST GEODE SPECIMEN

May 5, 2017, 6:30 PM EST
Detroit, MI, USA

$375 (starting bid)

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Importantes géodes d'améthystes du Brésil, les deux parties en coupe longitudinale, h. 61 cm

May 6, 2017, 9:45 AM CET
Prangins, Switzerland

CHF800 (starting bid)

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4813 GRAM 10 INCH AMETHYST GEODE

May 6, 2017, 10:00 AM EST
Tallahassee, FL, USA

$30 (1 bid)

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An amethyst geode, spherical in form, and polished to outer surface, 8cm diameter

May 9, 2017, 10:30 AM GMT
Hampstead, United Kingdom

£20 (starting bid)

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