Rock Identifier

Category

Mineral (Organic Gemstone)

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

Granitic Pegmatite (Granite Pegmatite (coarse-grained intrusive igneous rock)) — igneous

Granitic Pegmatite

Granite Pegmatite (coarse-grained intrusive igneous rock)

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

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Peridot (Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)) — Mineral

Peridot

Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)

Nuummite (Nuummite (Orthorhombic amphiboles: Anthophyllite and Gedrite)) — metamorphic

Nuummite

Nuummite (Orthorhombic amphiboles: Anthophyllite and Gedrite)

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)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Carnelian (SiO2 (Silicon Dioxide), a variety of Chalcedony) — mineral

Carnelian

SiO2 (Silicon Dioxide), a variety of Chalcedony

Aventurine (likely Green Aventurine) (Silicon Dioxide (SiO2) with mineral inclusions) — Mineral/Mineraloid within a rock matrix

Aventurine (likely Green Aventurine)

Silicon Dioxide (SiO2) with mineral inclusions

Mineral/Mineraloid within a rock matrix

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Olivine in Basalt (Peridot) (Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)) — igneous

Olivine in Basalt (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)

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

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

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

Moonstone (Feldspar variety)

Orthoclase Feldspar (KAlSi3O8)

Sapphire (Raw/Rough) (Corundum (Al2O3)) — mineral

Sapphire (Raw/Rough)

Corundum (Al2O3)

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

Quartz / Milky Quartz

Silicon Dioxide (SiO2)

Ruby (Raw/Rough) (Corundum (Al2O3 with Chromium trace)) — mineral

Ruby (Raw/Rough)

Corundum (Al2O3 with Chromium trace)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2 with Iron Oxide inclusions)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Iron Oxide inclusions)

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

Falcon's Eye (Blue Tiger's Eye)

Pseudomorph of Quartz after Crocidolite (SiO2)

Obsidian (Volcanic glass (Mainly SiO2)) — igneous

Obsidian

Volcanic glass (Mainly SiO2)

Petrified Wood (Silicified wood (primarily Silicon Dioxide - SiO2)) — mineral (silicate-replaced organic material)

Petrified Wood

Silicified wood (primarily Silicon Dioxide - SiO2)

mineral (silicate-replaced organic material)

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

Rhodonite

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

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

Rhodonite

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

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

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

Rhodonite

(Mn,Fe,Mg,Ca)SiO3

Rhodonite (Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn+2,Fe+2,Mg,Ca)SiO3) — mineral

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn+2,Fe+2,Mg,Ca)SiO3

Aquamarine with Ruby Accent (Beryllium Aluminum Silicate (Be3Al2Si6O18) with Aluminum Oxide (Al2O3)) — mineral

Aquamarine with Ruby Accent

Beryllium Aluminum Silicate (Be3Al2Si6O18) with Aluminum Oxide (Al2O3)

Yellow Aventurine (specifically a carved crescent moon) (Silicon Dioxide (SiO2) with inclusions) — mineral

Yellow Aventurine (specifically a carved crescent moon)

Silicon Dioxide (SiO2) with inclusions

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

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

Tiger's Eye

Pseudomorph of quartz after crocidolite (SiO2)

Jasper (Silicon dioxide / Chalcedony (SiO2)) — Sedimentary

Jasper

Silicon dioxide / Chalcedony (SiO2)

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Amber ((C10H16O)n – an amorphous organic substance, primarily composed of polymerized isoprenoids.) — Mineral

Amber

(C10H16O)n – an amorphous organic substance, primarily composed of polymerized isoprenoids.

Amazonite (Amazonite (KAlSi3O8 – a variety of Microcline, a Potassium Feldspar)) — mineral

Amazonite

Amazonite (KAlSi3O8 – a variety of Microcline, a Potassium Feldspar)

Sunstone (Plagioclase Feldspar (specifically Oligoclase variety containing hematite or goethite inclusions)", composition: (Ca,Na)(Al,Si)2Si2O8) — Mineral

Sunstone

Plagioclase Feldspar (specifically Oligoclase variety containing hematite or goethite inclusions)", composition: (Ca,Na)(Al,Si)2Si2O8

Blue Kyanite (Kyanite (Al2SiO5)) — mineral

Blue Kyanite

Kyanite (Al2SiO5)

Epidote (Epidote (Ca2(Al,Fe)3(SiO4)3(OH))) — mineral

Epidote

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Moonstone (bead form) (Potassium Aluminum Silicate (KAlSi3O8) - a variety of Orthoclase Feldspar) — Mineral

Moonstone (bead form)

Potassium Aluminum Silicate (KAlSi3O8) - a variety of Orthoclase Feldspar

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Yellow Jasper (Silicon Dioxide (SiO2)) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2)

Agate (Silicon dioxide (SiO2)) — mineral

Agate

Silicon dioxide (SiO2)

Carnelian Agate (Chalcedony (SiO2) with iron oxide inclusions) — mineral

Carnelian Agate

Chalcedony (SiO2) with iron oxide inclusions

Obsidian (Volcanic glass (SiO2 - Silicon Dioxide with impurities)) — igneous

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with impurities)

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]