Rock Identifier

Category

Organic Mineraloid And Mineral

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

Libyan Desert Glass (Impactite (High-silica tektite)) — mineral

Libyan Desert Glass

Impactite (High-silica tektite)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

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

Tiger's Eye

Tiger's Eye (Pseudomorph of Quartz after Crocidolite), SiO2

Amethyst (Silicon Dioxide (SiO2) with trace Iron (Fe)) — mineral

Amethyst

Silicon Dioxide (SiO2) with trace Iron (Fe)

Limonite (Limonite (FeOO·nH2O)) — mineral

Limonite

Limonite (FeOO·nH2O)

Citrine Quartz (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

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

Rhodonite

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

Iron Meteorite (Iron Meteorite (primarily Kamacite and Taenite, Fe-Ni alloys)) — mineral

Iron Meteorite

Iron Meteorite (primarily Kamacite and Taenite, Fe-Ni alloys)

Carnelian (SiO2 (Silicon Dioxide) - Carnelian Agate/Chalcedony) — mineral

Carnelian

SiO2 (Silicon Dioxide) - Carnelian Agate/Chalcedony

Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Opal

Hydrated Silica (SiO2·nH2O)

Green Adventurine (SiO2 (Silicon Dioxide with inclusions of Fuchsite mica)) — mineral

Green Adventurine

SiO2 (Silicon Dioxide with inclusions of Fuchsite mica)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Bronzite (Enstatite (var. Bronzite), (Mg,Fe)SiO3) — mineral

Bronzite

Enstatite (var. Bronzite), (Mg,Fe)SiO3

Fulonite (Fulgurite-like) (Fulgurite (SiO2 fused silica/lechatelierite)) — Metamorphic (Pseudo-igneous)

Fulonite (Fulgurite-like)

Fulgurite (SiO2 fused silica/lechatelierite)

Metamorphic (Pseudo-igneous)

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

Agate (Chalcedony)

Silicon Dioxide (SiO2)

Banded Calcite (often commercially called Onyx) (Calcite (Calcium Carbonate, CaCO3)) — mineral

Banded Calcite (often commercially called Onyx)

Calcite (Calcium Carbonate, CaCO3)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Jasper (Silicon dioxide, SiO2) — Mineral

Jasper

Silicon dioxide, SiO2

Amazonite (Microcline (KAlSi3O8 variant)) — mineral

Amazonite

Microcline (KAlSi3O8 variant)

Agate (SiO2 (Silicon dioxide, chalcedony variety)) — Mineral

Agate

SiO2 (Silicon dioxide, chalcedony variety)

Sapphire (Corundum (Al2O3)) — mineral

Sapphire

Corundum (Al2O3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Sunstone ((Ca,Na)((Al,Si)2Si2O8) - Plagioclase Feldspar) — mineral

Sunstone

(Ca,Na)((Al,Si)2Si2O8) - Plagioclase Feldspar

Diamond (Cubic Carbon (C)) — mineral

Diamond

Cubic Carbon (C)

Agate (Silicon dioxide (SiO2)) — mineral

Agate

Silicon dioxide (SiO2)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Pyrite in Matrix (Iron Sulfide (FeS2)) — mineral

Pyrite in Matrix

Iron Sulfide (FeS2)

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

Carnelian

Carnelian (Silicon Dioxide, SiO2)

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

Rhodonite

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

Pearl (Biogenic Calcium Carbonate (Aragonite and Conchiolin), CaCO3) — mineral

Pearl

Biogenic Calcium Carbonate (Aragonite and Conchiolin), CaCO3

Orca Agate (Chalcedony (SiO2) with various inclusions) — mineral

Orca Agate

Chalcedony (SiO2) with various inclusions

Chalcedony (Botryoidal Agate) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Botryoidal Agate)

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Tanzanite (Blue-violet Zoisite (Ca2Al3(SiO4)3(OH))) — mineral

Tanzanite

Blue-violet Zoisite (Ca2Al3(SiO4)3(OH))

Yellow Chalcedony (Agate/Jasper mix) (Silicon Dioxide (SiO2)) — mineral

Yellow Chalcedony (Agate/Jasper mix)

Silicon Dioxide (SiO2)

Native Gold in Quartz (Native Gold (Au)) — mineral

Native Gold in Quartz

Native Gold (Au)

Pearl (Calcium Carbonate (Aragonite) - CaCO3) — mineral

Pearl

Calcium Carbonate (Aragonite) - CaCO3

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

Chalcedony (Agate)

Silicon Dioxide (SiO2)

Bloodstone (Heliotrope) (Cryptocrystalline Quartz (SiO2) with inclusions of Hematite or Chlorite) — mineral

Bloodstone (Heliotrope)

Cryptocrystalline Quartz (SiO2) with inclusions of Hematite or Chlorite

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Carnelian (Carnelian Agate (SiO2)) — mineral

Carnelian

Carnelian Agate (SiO2)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)