Rock Identifier

Category

Organic Gemstone (Not A Mineral)

Browse organic gemstone (not a mineral) specimens identified by the Rock Identifier community.

Lake Superior Agate (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Lake Superior Agate

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Sunstone (Aventurine Feldspar (composition: (Ca,Na)((Al,Si)2Si2O8))) — mineral

Sunstone

Aventurine Feldspar (composition: (Ca,Na)((Al,Si)2Si2O8))

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Beryl (Emerald or Aquamarine in Matrix) (Beryllium Aluminum Silicate (Be3Al2Si6O18)) — mineral

Beryl (Emerald or Aquamarine in Matrix)

Beryllium Aluminum Silicate (Be3Al2Si6O18)

Aquamarine (Beryl) (Beryllium aluminum silicate (Be3Al2Si6O18)) — mineral

Aquamarine (Beryl)

Beryllium aluminum silicate (Be3Al2Si6O18)

Amethyst (Silicon Dioxide (SiO2) with Iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with Iron impurities

Chlorastrolite (Greenstone) (Chlorastrolite (Pumpellyite variety), Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2·H2O) — mineral

Chlorastrolite (Greenstone)

Chlorastrolite (Pumpellyite variety), Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2·H2O

Peridot (Olivine ((Mg, Fe)2SiO4)) — mineral

Peridot

Olivine ((Mg, Fe)2SiO4)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Amethyst (Amethyst (Varietal of Quartz), SiO2 (Silicon Dioxide)) — mineral

Amethyst

Amethyst (Varietal of Quartz), SiO2 (Silicon Dioxide)

Sunstone (Orthoclase or Oligoclase Feldspar (Na,Ca)(Al,Si)4O8) — mineral

Sunstone

Orthoclase or Oligoclase Feldspar (Na,Ca)(Al,Si)4O8

Amethyst (Quartz (Silicon Dioxide) with Iron impurities, SiO2) — mineral

Amethyst

Quartz (Silicon Dioxide) with Iron impurities, SiO2

Amethyst (Quartz Variety) (Amethyst (Silicon Dioxide - SiO2 with ferric iron impurities)) — mineral

Amethyst (Quartz Variety)

Amethyst (Silicon Dioxide - SiO2 with ferric iron impurities)

Sunstone (Oligoclase (a plagioclase feldspar variant), (Na,Ca)(Al,Si)4O8) — mineral

Sunstone

Oligoclase (a plagioclase feldspar variant), (Na,Ca)(Al,Si)4O8

Amethyst (Chevron or Banded variety) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Chevron or Banded variety)

Silicon Dioxide (SiO2) with iron impurities

Shale or Siltstone (Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)) — sedimentary

Shale or Siltstone

Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)

Potassium Feldspar (Orthoclase) (Orthoclase (KAlSi3O8)) — mineral

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

Orthoclase Feldspar with Quartz (Orthoclase (KAlSi3O8)) — mineral

Orthoclase Feldspar with Quartz

Orthoclase (KAlSi3O8)

Fluorite (Fluorite (Calcium Fluoride, CaF2)) — mineral

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Sodalite (Na8(Al6Si6O24)Cl2) — mineral

Sodalite

Na8(Al6Si6O24)Cl2

Black Tourmaline (Schorl) (Sodium Iron Aluminum Borosilicate (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)) — mineral

Black Tourmaline (Schorl)

Sodium Iron Aluminum Borosilicate (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)

Chrysocolla (Hydrated copper silicates (Cu, Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla

Hydrated copper silicates (Cu, Al)2H2Si2O5(OH)4·nH2O

Amazonite (Amazonite (KAlSi3O8)) — mineral

Amazonite

Amazonite (KAlSi3O8)

Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)

Almandine Garnet in Matrix (Almandine Garnet (Fe3Al2(SiO4)3) in Schist/Quartz Matrix) — metamorphic

Almandine Garnet in Matrix

Almandine Garnet (Fe3Al2(SiO4)3) in Schist/Quartz Matrix

Moonstone (Feldspar variety) (Orthoclase Feldspar (KAlSi3O8)) — mineral

Moonstone (Feldspar variety)

Orthoclase Feldspar (KAlSi3O8)

Yellow Topaz (Imperial or Precious Topaz) (Al2SiO4(F,OH)2 (Aluminum Silicate Fluoride Hydroxide)) — mineral

Yellow Topaz (Imperial or Precious Topaz)

Al2SiO4(F,OH)2 (Aluminum Silicate Fluoride Hydroxide)

K2 Jasper (K2 Granite) (Azurite in Granite (Al2Cu3(CO3)2(OH)2 in NaAlSi3O8)) — igneous

K2 Jasper (K2 Granite)

Azurite in Granite (Al2Cu3(CO3)2(OH)2 in NaAlSi3O8)

Citrine (Silicon Dioxide (SiO₂)) — mineral

Citrine

Silicon Dioxide (SiO₂)

Amethyst (Amethyst (Silicon Dioxide, SiO2)) — mineral

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Carnelian (Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Emerald (Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities) — mineral

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Amethyst (Amethyst (Silicon Dioxide, SiO2)) — mineral

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Blue Chalcedony (Chalcedony (a cryptocrystalline variety of Quartz - SiO₂)) — Mineral

Blue Chalcedony

Chalcedony (a cryptocrystalline variety of Quartz - SiO₂)

Yellow Quartz (Citrine/Lemon Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine/Lemon Quartz)

Silicon Dioxide (SiO2)

Amethyst (Silicon Dioxide (SiO2) containing Iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) containing Iron impurities

Aquamarine (Beryl (Be3Al2Si6O18 with iron impurities)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18 with iron impurities)

Amethyst (Rose-tinted/Pale variety) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Rose-tinted/Pale variety)

Silicon Dioxide (SiO2) with iron impurities

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Morganite (Pink Beryl) (Beryllium aluminum silicate Be3Al2(SiO3)6) — mineral

Morganite (Pink Beryl)

Beryllium aluminum silicate Be3Al2(SiO3)6

Amazonite with Smoky Quartz and Feldspar (Microcline (KAlSi3O8) with Quartz (SiO2)) — mineral

Amazonite with Smoky Quartz and Feldspar

Microcline (KAlSi3O8) with Quartz (SiO2)

Tiger's Eye (Silicon Dioxide (SiO2) with Limonite/Goethite pseudomorphs after Crocidolite) — Mineral

Tiger's Eye

Silicon Dioxide (SiO2) with Limonite/Goethite pseudomorphs after Crocidolite