Blue Chalcedony
Chalcedony (a cryptocrystalline variety of Quartz - SiO₂)
Category
Browse mineral (variety of quartz) specimens identified by the Rock Identifier community.
Blue Chalcedony
Chalcedony (a cryptocrystalline variety of Quartz - SiO₂)
Amethyst (Chevron or Banded variety)
Silicon Dioxide (SiO2) with iron impurities
Agate
Silicon dioxide (SiO2) - variety Chalcedony
Milky Quartz
Quartz (SiO2)
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Ruby (Rough/Raw)
Corundum (Al2O3:Cr)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Tumbled Agate and Chalcedony
Cryptocrystalline Quartz (SiO2)
Chalcedony (Agate/Carnelian)
Cryptocrystalline Quartz (SiO2)
Yellow Chalcedony
Cryptocrystalline Quartz (SiO2)
Smoky Quartz
SiO2 (Silicon Dioxide)
Carnelian (Orange Agate)
Silicon Dioxide (SiO2)
Quartz (Milky/Crystalline variety)
Silicon Dioxide (SiO2)
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
Rose Quartz
Crystalline Silicon Dioxide with trace Titanium/Manganese/Iron (SiO2)
Pyrite (Fools Gold)
Iron Sulfide (FeS2)
Pink Feldspar
Potassium Feldspar (KAlSi3O8)
Carnelian (Flame Polished)
Carnelian (SiO2 with Iron Oxide impurities)
Quartz
Silicon Dioxide (SiO2)
Black Tourmaline
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide)
Banded Calcite (often sold as 'Mexican Onyx')
Calcite (Calcium Carbonate, CaCO3)
Quartz Pebble (Chert/Chalcedony)
Silicon Dioxide (SiO2)
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8
Amazonite
Microcline (KAlSi3O8) with Pb trace impurities
Citrine Quartz
Citrine (Silicon Dioxide - SiO2)
Quartz (Milky or Smoky)
Silicon Dioxide (SiO2)
Rose Quartz Pebble
Rose Quartz (SiO2 with inclusions of Dumortierite)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Polychrome Jasper
Silicon Dioxide (SiO2) with impurities
Quartz (Smoky/Clear variety)
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2)
Rose Quartz
Quartz (Silicon Dioxide, SiO2) with trace inclusions of dumortierite
Quartz
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Rose Quartz
Silicon Dioxide (SiO2) with trace impurities of titanium, iron, or manganese
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron
Quartz (Milky/Common variety)
Silicon Dioxide (SiO2)
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
Agate
SiO2 (Silicon dioxide, cryptocrystalline quartz)
Chert
Microcrystalline Quartz (SiO2)
Rough Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese