Chalcedony

Chalcedony is a cryptocrystalline form of silica composed of fine intergrowths of quartz and moganite. It includes agates, jaspers, and other colorful varieties.

3 specimens starting with "B" (of 15 total)

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Gem

Black Agate

Hardness: 6.5 - 7

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Bloodstone

Hardness: 6.5 - 7

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Blue Chalcedony

Hardness: 6.5 - 7

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Minerals (5084)Other (498)Igneous (34)Metamorphic (25)Quartz (23)Zeolite (22)Sedimentary (22)Tourmaline Group (18)Fossil (15)Jasper (12)Eudialyte group (9)Calcium Amphibole Subgroup (8)View All Categories

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