Tumbled Grey Agate
Silicon dioxide (Chalcedony variety), SiO2
Category
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
Tumbled Grey Agate
Silicon dioxide (Chalcedony variety), SiO2
Carnelian Beads
Silicon Dioxide (Variety of Chalcedony), $SiO_2$
Carnelian
Silicon dioxide (chalcedony variety), SiO2
Chrysoprase
Silicon Dioxide (Chalcedony variety), SiO2
Yellow Agate
Silicon Dioxide (Chalcedony variety), SiO2
Carnelian Agate
Silicon Dioxide (SiO2) - Chalcedony variety
Carnelian
Silicon Dioxide (Chalcedony variety), SiO2
Carnelian
Silicon Dioxide (Chalcedony variety), SiO2
Blue Lace Agate (Beads)
Silicon dioxide (SiO2) - Variety of Chalcedony
Amethyst-bearing quartz (likely polished or naturally fractured)
Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron-related defects
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Opalite
Synthetic Glass (Simulated Moonstone/Opal)
Chert (with Lichen)
Microcrystalline Quartz (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Gray Agate
Cryptocrystalline Quartz (SiO2)
Carnelian
Chalcedony (SiO2)
Schist
Lepidoblastic Mica Schist
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Tektite (Indochinite)
Tektite (Amorphous Silica Glass)
Red Jasper
Jasper (Silicon Dioxide) - SiO2
Jasper
Jasper (Cryptocrystalline Quartz, SiO2)
Fancy Jasper
Silicon dioxide (SiO2)
Red Jasper (Mahogany Obsidian variant similarity)
Silicon Dioxide (SiO2) with iron oxide inclusions
Red Jasper (River-worn Pebble)
Silicon Dioxide (SiO2) with Ferric Iron inclusions
Jasper (Mookaite style)
Silicon Dioxide (SiO2) with iron and manganese inclusions
Apache Tears (Obsidian)
Hydrated Volcanic Glass (Amorphous SiO2 + H2O)
Red Jasper
Silicon Dioxide (SiO2)
Citrine Quartz
Silicon Dioxide (SiO2)
Amethyst
SiO2 (Silicon Dioxide) - Purple variety of Quartz
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
Tumbled blue chalcedony (likely dyed)
Cryptocrystalline quartz, SiO₂; chalcedony variety
Tumbled orange chalcedony (likely carnelian)
Carnelian, a cryptocrystalline variety of quartz (SiO₂)
Carnelian
Silicon Dioxide (Chalcedony variety), SiO2
Carnelian
Silicon Dioxide (Chalcedony variety), SiO2
Carnelian
Silicon Dioxide (Chalcedony variety), SiO2
Agate
Silicon Dioxide (Chalcedony variety), SiO2
Agate
Silicon Dioxide (Chalcedony variety, $SiO_2$)
Tumbled carnelian (reddish chalcedony)
Carnelian, a cryptocrystalline variety of quartz (SiO₂)
Carnelian
Silicon Dioxide (Variety of Chalcedony, SiO2)
Dyed Blue Agate Slice
Silicon Dioxide (Chalcedony variety), $SiO_2$
Yellow Agate
Silicon Dioxide (Chalcedony variety), SiO2
Carnelian
Silicon Dioxide (Chalcedony variety), SiO2