Milky Quartz
Silicon Dioxide (SiO2)
Category
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
Green Tourmaline
Verdelite (Silicate mineral); Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
Gastly (Trick or Trade Halloween Series)
Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
Gneiss (specifically a Granitic Gneiss)
Gneiss (Composition: Quartz, Feldspar, Mica)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
Amber
Succinite (fossilized resin)
Amethyst
Amethyst (Silicon Dioxide, SiO2)
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
Onyx (Black Onyx)
Onyx (Silicon Dioxide, SiO2)
Pink Garnet (likely Almandine or Rhodolite)
Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)
Kyanite
Kyanite (Al2SiO5)
Amazonite
Amazonite (KAlSi3O8)
Sugilite
Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)
Clear Quartz
Silicon Dioxide (SiO2)
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
Lake Superior Agate
Banded Chalcedony (Silicon Dioxide / SiO2)
Amazonite
Potassium Feldspar (Microcline) - K(AlSi3O8)
Diamond
C (Carbon)
Orange Calcite (Mexican Onyx)
Calcium Carbonate (CaCO3)
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate)
Yellow Quartz (Chalcedony/Citrine Pebble)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
Amazonite
K(AlSi3O8) - Microcline (Var. Amazonite)
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
Milky Quartz
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Amethyst
Amethyst (Silicon Dioxide, SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Schorl (Black Tourmaline)
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4
Satin Spar (often marketed as Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O