Gray chalcedony (microcrystalline quartz)
Chalcedony, SiO₂; likely common gray/blue-gray variety
Category
Browse mineral (chalcedony variety) specimens identified by the Rock Identifier community.
Gray chalcedony (microcrystalline quartz)
Chalcedony, SiO₂; likely common gray/blue-gray variety
Tumbled Agate
Silicon Dioxide (SiO2)
Carnelian
Carnelian (SiO2 with iron oxide impurities)
Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
Red Jasper
Silicon dioxide with hematite impurities (SiO2 + Fe2O3)
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide impurities), SiO2
Banded Agate (Gray/Brown)
Silicon Dioxide (SiO2)
Carnelian
Carnelian (SiO2 with Iron Oxide impurities)
Agate
Silicon dioxide (SiO2)
Red Jasper
Jasper (Silicon Dioxide, SiO2)
Agate (Carnelian-like)
Chalcedony (Silicon Dioxide, SiO2)
Chalcedony (Quartz Pebbles)
Silicon Dioxide (SiO2)
Moss Agate
Silicon Dioxide (Chalcedony variety)
Carnelian
Carnelian (variety of Chalcedony, SiO2)
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Carnelian
Carnelian (variety of Chalcedony, SiO2)
Carnelian
Carnelian (variety of Chalcedony, SiO2)
Chrysoprase
Chalcedony (cryptocrystalline SiO2 variety)
Carnelian
Carnelian (SiO2) - Chalcedony variety
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Onyx
Onyx (a variety of Chalcedony, SiO₂)
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Jasper
Jasper (a variety of Chalcedony, SiO2)
Chrysoprase
Chrysoprase (a variety of Chalcedony, SiO₂)
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Red Jasper (possibly)
Jasper (a variety of Chalcedony, SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Black Onyx
Silicon Dioxide (SiO2)
Blue Chalcedony
Chalcedony (a cryptocrystalline variety of Quartz - SiO₂)
Yellow Chalcedony
Cryptocrystalline Quartz (SiO2)
Tumbled banded jasper, likely brecciated jasper
Microcrystalline quartz (SiO₂) with iron-oxide and clay inclusions
Tumbled blue chalcedony or pale aquamarine-like quartz
Chalcedony (microcrystalline SiO₂), possibly blue quartz; visual identification is uncertain
Jasper Pendant
Silicon dioxide (SiO2) with impurities
Tumbled brown jasper (likely common jasper or chert)
Microcrystalline quartz, SiO₂, chiefly chalcedony/quartz with iron-oxide impurities
Tumbled quartz-rich stone, likely brown agate or jasper
Microcrystalline silica (chalcedony/quartz, SiO₂), possibly iron-stained agate or jasper
Quartz (Agate/Chalcedony)
Silicon Dioxide (SiO2)
Tumbled Agate
Silicon Dioxide (SiO2)
Chalcedony (Agate/Carnelian pebbles)
Cryptocrystalline Quartz (SiO2)
Agate
Silicon dioxide (SiO2)
Agate (Carnelian-Blue Agate mix)
Silicon Dioxide (SiO2)
Agate (Chalcedony Variation)
Silicon Dioxide (SiO2)