Quartz (Var: Chalcedony)
Unknown Owner
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This is a (human) brain-sized, natural formation of coral that has been pseudomorphed inside by gleaming chalcedony. There are other examples of pseudomorphs of minerals after organic matter, including (of course) petrified wood. But this has to be one of the more dramatic.
Product details
Known provenance
| Date | Collector | Acquisition price |
|---|---|---|
| 08/2024 | Unknown Owner | Not disclosed |
| — | The Arkenstone | Not disclosed |
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Mineral guide
Learn about Chalcedony
microcrystalline quartz with agate, jasper, chrysoprase; waxy to glassy surfaces, banding and botryoidal forms, a colorful, collectible spectrum.Regional guide
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