Rock Identifier

Category

Mineral (Organic Gemstone)

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

Garnet (likely Almandine or Pyrope) (Garnet Group (Fe3Al2Si3O12 or Mg3Al2Si3O12)) — mineral

Garnet (likely Almandine or Pyrope)

Garnet Group (Fe3Al2Si3O12 or Mg3Al2Si3O12)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Aquamarine (Beryl (Be3Al2Si6O18)) — Mineral

Aquamarine

Beryl (Be3Al2Si6O18)

Rhodolite Garnet (Magnesium Aluminum Silicate; formula: (Mg,Fe)3Al2(SiO4)3) — mineral

Rhodolite Garnet

Magnesium Aluminum Silicate; formula: (Mg,Fe)3Al2(SiO4)3

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Amazonite (Amazonite (KAlSi3O8) - a variety of Microcline Feldspar) — Mineral

Amazonite

Amazonite (KAlSi3O8) - a variety of Microcline Feldspar

Obsidian (Obsidian (Amorphous volcanic glass)) — igneous

Obsidian

Obsidian (Amorphous volcanic glass)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Malachite (Copper(II) carbonate hydroxide [Cu2CO3(OH)2]) — mineral

Malachite

Copper(II) carbonate hydroxide [Cu2CO3(OH)2]

Amethyst (SiO2 (Silicon Dioxide with iron impurities and irradiation)) — mineral

Amethyst

SiO2 (Silicon Dioxide with iron impurities and irradiation)

Smoky Quartz (SiO2 (Silicon Dioxide with aluminum impurities)) — mineral

Smoky Quartz

SiO2 (Silicon Dioxide with aluminum impurities)

Quartz / Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz / Milky Quartz

Silicon Dioxide (SiO2)

Moonstone (Orthoclase (KAlSi3O8), a variety of potassium feldspar) — mineral

Moonstone

Orthoclase (KAlSi3O8), a variety of potassium feldspar

Clear Quartz (Tumbled) (Quartz (Silicon Dioxide - SiO2)) — mineral

Clear Quartz (Tumbled)

Quartz (Silicon Dioxide - SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

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

Amethyst (Faceted)

Silicon Dioxide with Iron impurities (SiO2)

Pearl (Calcium carbonate (CaCO3) - mainly Aragonite) — mineral

Pearl

Calcium carbonate (CaCO3) - mainly Aragonite

Emerald in Matrix (Beryl (Be3Al2Si6O18) containing Chromium/Vanadium impurities) — mineral

Emerald in Matrix

Beryl (Be3Al2Si6O18) containing Chromium/Vanadium impurities

Calcite (Calcite (CaCO₃)) — Mineral

Calcite

Calcite (CaCO₃)

Rutilated Quartz (Quartz (SiO2) with Rutile Inclusions (TiO2)) — Mineral

Rutilated Quartz

Quartz (SiO2) with Rutile Inclusions (TiO2)

Green Aventurine (Green Quartz) (Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)) — Mineral/Metamorphic rock

Green Aventurine (Green Quartz)

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Mineral/Metamorphic rock

Dalmatian Jasper (Dalmatian Stone) (Dalmatian Stone (primarily Feldspar, Quartz, and Arfvedsonite/Tourmaline)) — igneous

Dalmatian Jasper (Dalmatian Stone)

Dalmatian Stone (primarily Feldspar, Quartz, and Arfvedsonite/Tourmaline)

Jasper (var. Ocean or Polychrome Jasper) (Silicon Dioxide (SiO2) with iron and mineral inclusions) — sedimentary

Jasper (var. Ocean or Polychrome Jasper)

Silicon Dioxide (SiO2) with iron and mineral inclusions

Quartz (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Turquoise (Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Red Jasper (Jasper (Silicon Dioxide) - SiO2) — sedimentary/mineral

Red Jasper

Jasper (Silicon Dioxide) - SiO2

sedimentary/mineral

Moissanite (Silicon Carbide (SiC)) — mineral

Moissanite

Silicon Carbide (SiC)

Kimberlite (Kimberlite (Group I or II)) — igneous

Kimberlite

Kimberlite (Group I or II)

Quartz (Milky or Cloudy variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Cloudy variety)

Silicon Dioxide (SiO2)

Granite (Phaneritic Igneous Rock (Granite)) — igneous

Granite

Phaneritic Igneous Rock (Granite)

Quartz (Raw Chunk) (Silicon Dioxide (SiO2)) — mineral

Quartz (Raw Chunk)

Silicon Dioxide (SiO2)

Epidote (Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)) — Mineral

Epidote

Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)

Tiger's Eye (Pseudomorph of quartz after crocidolite (SiO2 with iron inclusions)) — metamorphic

Tiger's Eye

Pseudomorph of quartz after crocidolite (SiO2 with iron inclusions)

Lapis Lazuli (Lapis lazuli (Mainly Lazurite: Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)) — metamorphic

Lapis Lazuli

Lapis lazuli (Mainly Lazurite: Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Green Fluorite (Calcium Fluoride (CaF2)) — mineral

Green Fluorite

Calcium Fluoride (CaF2)

Sapphire (Corundum variety) (Sapphire (Al₂O₃)) — Mineral

Sapphire (Corundum variety)

Sapphire (Al₂O₃)

Green Fluorite (Fluorite Sphere) (Calcium Fluoride (CaF2)) — mineral

Green Fluorite (Fluorite Sphere)

Calcium Fluoride (CaF2)

Smoky Quartz (Quartz (SiO₂)) — Mineral

Smoky Quartz

Quartz (SiO₂)