Rock Identifier

Category

Mineral And Organic Gemstone

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

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

Yellow Quartz / Citrine Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

mineral
Pyrite (Iron Pyrites) (Iron Sulfide (FeS2)) — mineral

Pyrite (Iron Pyrites)

Iron Sulfide (FeS2)

mineral
Sodalite (Sodalite (Na8(Al6Si6O24)Cl2)) — mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

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

Citrine Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Sodalite (Sodalite (Na8(Al6Si6O24)Cl2)) — mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

mineral
Sodalite (Sodalite (Na8(Al6Si6O24)Cl2)) — mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

mineral
Smoky Quartz (Smoky Quartz (SiO2)) — mineral

Smoky Quartz

Smoky Quartz (SiO2)

mineral
Green Chalcedony (Silicon Dioxide (SiO2) with trace minerals) — mineral

Green Chalcedony

Silicon Dioxide (SiO2) with trace minerals

mineral
Fuchsite (Chromium-bearing Muscovite [K(Al,Cr)2(AlSi3O10)(OH)2]) — mineral

Fuchsite

Chromium-bearing Muscovite [K(Al,Cr)2(AlSi3O10)(OH)2]

mineral
Banded Agate (specifically Lake Superior Agate type) (Silicon Dioxide (SiO2) - Microcrystalline Chalcedony) — mineral

Banded Agate (specifically Lake Superior Agate type)

Silicon Dioxide (SiO2) - Microcrystalline Chalcedony

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

Chalcedony (Carnelian variety)

Silicon Dioxide (SiO2)

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

Orthoclase Feldspar

Potassium aluminum silicate (KAlSi3O8)

mineral
Banded River Rock / Gneiss (highly weathered) (Gneiss) — Metamorphic rock

Banded River Rock / Gneiss (highly weathered)

Gneiss

Metamorphic rock
Quartz (Milky/Crystalline variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)

mineral
Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

mineral
Ethiopian Opal (Welo Opal in Matrix) (Hydrated Silica (SiO2·nH2O)) — mineral

Ethiopian Opal (Welo Opal in Matrix)

Hydrated Silica (SiO2·nH2O)

mineral
Amethyst (SiO2 (Silicon Dioxide) - Purple variety of Quartz) — mineral

Amethyst

SiO2 (Silicon Dioxide) - Purple variety of Quartz

mineral
Quartz with mica and feldspar (Pegmatite fragment) (Granitic Pegmatite (composed mainly of SiO2 with KAlSi3O8)) — igneous

Quartz with mica and feldspar (Pegmatite fragment)

Granitic Pegmatite (composed mainly of SiO2 with KAlSi3O8)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral
Bronzite (MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)) — Mineral

Bronzite

MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)

Mineral
Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

metamorphic
Turquoise and Hematite (Turquoise: CuAl6(PO4)4(OH)8·4H2O; Hematite: Fe2O3) — mineral

Turquoise and Hematite

Turquoise: CuAl6(PO4)4(OH)8·4H2O; Hematite: Fe2O3

mineral
Lapis Lazuli (Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)) — metamorphic

Lapis Lazuli

Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

metamorphic
Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

mineral
Magnetite (Iron Ore) (Magnetite (Fe3O4)) — mineral

Magnetite (Iron Ore)

Magnetite (Fe3O4)

mineral
Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

mineral
Red Jasper (Silicon Dioxide (SiO2) with Hematite inclusions) — mineral

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

mineral
Carnelian (Red Chalcedony) (Silicon Dioxide (SiO2) - variety of Chalcedony) — mineral

Carnelian (Red Chalcedony)

Silicon Dioxide (SiO2) - variety of Chalcedony

mineral
Carnelian Agate (Silicon Dioxide (SiO2) with iron oxide impurities) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide impurities

mineral
Rhodonite (Manganese Silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

mineral
Sunstone (Oligoclase (Plagioclase Feldspar) - (Ca,Na)(Al,Si)4O8) — mineral

Sunstone

Oligoclase (Plagioclase Feldspar) - (Ca,Na)(Al,Si)4O8

mineral
Rhodonite (Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3

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

Carnelian

Carnelian (SiO2 - Silicon Dioxide)

mineral
Rhodonite Tumbled Chips (Manganese silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite Tumbled Chips

Manganese silicate (Mn,Fe,Mg,Ca)SiO3

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

mineral
Blue Kyanite (Kyanite (Al2SiO5)) — mineral

Blue Kyanite

Kyanite (Al2SiO5)

mineral
Ametrine (SiO2 (silicon dioxide)) — Mineral

Ametrine

SiO2 (silicon dioxide)

Mineral