Mocha stone, sardonyx and agate
Mocha stone and sardonyx cameos resting on artificially dyed slabs of agate. All these varieties of chalcedony derive from the cryptocrystalline quartz group
Picture No
10703718
Media ID
47586282
Size
1498px x 1909px
(1.6MB)
Credit
Mary Evans / Natural History Museum
Source
Photograph from the Natural History Museum Collection
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Agate Artefact Artifact Artificial Banded Cameo Chalcedony Cryptocrystalline Dioxide Gemstone Mineral Mocha Onyx Quartz Sardonyx Silicate Silicon Tectosilicate
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