Rock Identifier

Category

Mineral And Organic Gemstone

Browse mineral and organic gemstone specimens identified by the Rock Identifier community.

Citrine (Quartz (SiO₂)) — mineral

Citrine

Quartz (SiO₂)

Rough Quartz (with potential Host Rock) (Silicon Dioxide (SiO2)) — mineral

Rough Quartz (with potential Host Rock)

Silicon Dioxide (SiO2)

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

Amethyst

Quartz (Silicon Dioxide) with Ferric Iron impurities - SiO2

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

Aquamarine

Beryl (Be3Al2Si6O18 with iron impurities)

Blue Sapphire (Corundum (Al2O3 with trace Titanium and Iron)) — mineral

Blue Sapphire

Corundum (Al2O3 with trace Titanium and Iron)

Jade (Jadeite or Nephrite (both are commonly referred to as 'jade'). Jadeite: NaAlSi2O6; Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2.) — Mineral

Jade

Jadeite or Nephrite (both are commonly referred to as 'jade'). Jadeite: NaAlSi2O6; Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2.

Black Spinel (Magnesium Aluminum Oxide (MgAl2O4)) — mineral

Black Spinel

Magnesium Aluminum Oxide (MgAl2O4)

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

Carnelian

Carnelian (Silicon Dioxide, SiO2)

Diamond (Green tinted) (Carbon (C) with trace impurities or lattice defects) — mineral

Diamond (Green tinted)

Carbon (C) with trace impurities or lattice defects

Tiger's Eye (Silicon dioxide (SiO2) with fibrous inclusions of crocidolite) — Mineral

Tiger's Eye

Silicon dioxide (SiO2) with fibrous inclusions of crocidolite

Ruby (Corundum (Al2O3 with Chromium trace elements)) — mineral

Ruby

Corundum (Al2O3 with Chromium trace elements)

Amethyst (Amethyst is a variety of Quartz (SiO₂)) — Mineral

Amethyst

Amethyst is a variety of Quartz (SiO₂)

Carnelian (Carnelian (SiO2 - Silicon Dioxide with Iron Oxide impurities)) — mineral

Carnelian

Carnelian (SiO2 - Silicon Dioxide with Iron Oxide impurities)

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

Aquamarine

Beryl (Be3Al2Si6O18 with iron impurities)

Orthoclase Feldspar (Orthoclase (KAlSi₃O₈)) — mineral

Orthoclase Feldspar

Orthoclase (KAlSi₃O₈)

Lavender Agate / Chalcedony Sphere (Agate (Microcrystalline Quartz) - SiO2) — mineral

Lavender Agate / Chalcedony Sphere

Agate (Microcrystalline Quartz) - SiO2

Jasper (Jasper (Silica/Silicon Dioxide, SiO2)) — sedimentary

Jasper

Jasper (Silica/Silicon Dioxide, SiO2)

Lepidolite and Rubellite (Pink Tourmaline) (Lepidolite [K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2] and Rubellite [Na(Li,Al)3Al6(BO3)3Si6O18(OH)4]) — igneous

Lepidolite and Rubellite (Pink Tourmaline)

Lepidolite [K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2] and Rubellite [Na(Li,Al)3Al6(BO3)3Si6O18(OH)4]

Quartz (Silicon Dioxide (SiO₂)) — Mineral

Quartz

Silicon Dioxide (SiO₂)

Staurolite (Fairy Stone) (Staurolite (Fe2+2Al9Si4O23(OH))) — metamorphic

Staurolite (Fairy Stone)

Staurolite (Fe2+2Al9Si4O23(OH))

Quartz (specifically Quartzite or Massive Quartz) (Silicon Dioxide (SiO2)) — Mineral

Quartz (specifically Quartzite or Massive Quartz)

Silicon Dioxide (SiO2)

Pearl (Calcium Carbonate (CaCO3) in the form of Aragonite) — mineral

Pearl

Calcium Carbonate (CaCO3) in the form of Aragonite

Obsidian (Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)) — igneous

Obsidian

Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Obsidian (Obsidian (Volcanic Glass, complex silicate)) — igneous

Obsidian

Obsidian (Volcanic Glass, complex silicate)

Red Jasper (with Quartz inclusions) (Silicon Dioxide (SiO2)) — sedimentary (physico-chemical)

Red Jasper (with Quartz inclusions)

Silicon Dioxide (SiO2)

sedimentary (physico-chemical)

Green Quartzite (Metamorphic rock primarily composed of Silicon Dioxide (SiO2) with mineral inclusions like fuchsite or chlorite) — metamorphic

Green Quartzite

Metamorphic rock primarily composed of Silicon Dioxide (SiO2) with mineral inclusions like fuchsite or chlorite

Amber (Succinite (C10H16O)) — Organic Mineraloid

Amber

Succinite (C10H16O)

Organic Mineraloid

Quartz (Common or Milky) (Silicon Dioxide (SiO2)) — mineral

Quartz (Common or Milky)

Silicon Dioxide (SiO2)

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

Carnelian

Carnelian (Silicon Dioxide, SiO2)

Turquoise (Turquoise - CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O

Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Satin Spar Selenite (Gypsum (CaSO4·2H2O)) — mineral

Satin Spar Selenite

Gypsum (CaSO4·2H2O)

Carnelian (Carnelian (Silicon Dioxide - SiO2 with Hematite impurities)) — Mineral

Carnelian

Carnelian (Silicon Dioxide - SiO2 with Hematite impurities)

Carnelian Agate (Silicon Dioxide (SiO2) - Variety of Chalcedony) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Olivine (Peridot in gem form) (Magnesium Iron Silicate (Mg,Fe)2SiO4) — mineral

Olivine (Peridot in gem form)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Yellow Quartz (Citrine Quartz or Yellow Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine Quartz or Yellow Chalcedony)

Silicon Dioxide (SiO2)

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Schorl (Black Tourmaline) (NaFe3Al6(BO3)3Si6O18(OH)4 (Complex Borosilicate)) — mineral

Schorl (Black Tourmaline)

NaFe3Al6(BO3)3Si6O18(OH)4 (Complex Borosilicate)

Almandine Garnet (Almandine (Fe3Al2(SiO4)3)) — mineral

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Queen Conch Shell (Biogenic Calcium Carbonate) (Aliger gigas (synonym Strombus gigas); Composition: Aragonite (CaCO3)) — mineral

Queen Conch Shell (Biogenic Calcium Carbonate)

Aliger gigas (synonym Strombus gigas); Composition: Aragonite (CaCO3)