Chert (Jasper-like)
SiO2 (Cryptocrystalline Quartz)
Category
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
Chert (Jasper-like)
SiO2 (Cryptocrystalline Quartz)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
White Quartz Pebbles
Quartz (Silicon Dioxide, SiO2)
Dyed Agate Slice
Silicon Dioxide (SiO2) with artificial colorants
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Obsidian
Obsidian (Amorphous volcanic glass, predominantly SiO2)
Chert (often called Flint)
Silicon Dioxide (SiO2)
Chert (Septarian Concretion/Nodule)
Microcrystalline silica (SiO2) with carbonate mineral veining
Sandstone Concretion
Arenaceous concretion (primarily SiO2 with Fe2O3 staining)
Chalcopyrite-bearing Ore
Chalcopyrite (CuFeS2)
Amethyst
Amethyst (SiO2 with Iron impurities)
Kunzite (Pink Spodumene)
Spodumene, LiAl(SiO3)2
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
Citrine Quartz
Silicon Dioxide (SiO2)
Rhodochrosite with Pyrite and Quartz
Manganese Carbonate (MnCO3)
Chrysocolla in Matrix
Hydrated copper silicate - (Cu,Al)2H2Si2O5(OH)4·nH2O
Amazonite in Matrix
Potassium Feldspar (Microcline), KAlSi3O8
Turquoise
Hydrated phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)
Sunstone
Plagioclase feldspar (with Copper or Hematite inclusions)
Labradorite
Labradorite (Plagioclase Feldspar Series: (Ca,Na)(Al,Si)4O8)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Citrine
Citrine (Silicon Dioxide - SiO2)
Amethyst
Amethyst (Silicon Dioxide, SiO2)
Amazonite
Microcline (KAlSi3O8) with lead inclusions
Amazonite
Potassium Feldspar (Microcline), K(AlSi3O8)
Amethyst
Amethyst (Silicon Dioxide, SiO2 with Iron impurities)
Amazonite
Potassium Feldspar (Microcline), K(AlSi3O8)
Honey Calcite
Calcium Carbonate (CaCO3)
Quartz (Flesh-colored or Rose Quartz variety)
Silicon Dioxide (SiO2)
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
Black Diamond / Black Sapphire
Carbon (C) or Corundum (Al2O3)
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Rhodochrosite
Manganese Carbonate (MnCO3)
Green Quartzite
Quartzite (SiO2)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Jasper
Silicon Dioxide (SiO2) - a variety of Chalcedony (Cryptocrystalline Quartz)
Carnelian
Carnelian (a variety of Chalcedony, SiO2) colored by iron oxide
White Topaz
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)
Pink Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
Howlite (White Buffalo Turquoise)
Howlite (Calcium Borosilicate Hydroxide), Ca2B5SiO9(OH)5