Rock Identifier

Category

Mineral (Primary Constituent)

Browse mineral (primary constituent) specimens identified by the Rock Identifier community.

Learn about Mineral (Primary Constituent) in the encyclopedia

Coal

Priday Plume Agate

Cuprite (Cuprite (Copper(I) oxide, Cu2O)) — mineral

Cuprite

Cuprite (Copper(I) oxide, Cu2O)

Chalcopyrite (Peacock Ore) (Chalcopyrite (CuFeS2)) — mineral

Chalcopyrite (Peacock Ore)

Chalcopyrite (CuFeS2)

Muscovite Mica (Muscovite (Potassium Aluminum Silicate) - KAl2(AlSi3O10)(F,OH)2) — mineral

Muscovite Mica

Muscovite (Potassium Aluminum Silicate) - KAl2(AlSi3O10)(F,OH)2

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Copper Ore (Native Copper (Cu) often found with Chalcocite (Cu2S) or Bornite (Cu5FeS4)) — mineral

Copper Ore

Native Copper (Cu) often found with Chalcocite (Cu2S) or Bornite (Cu5FeS4)

Limonite (Ironstone Concretion) (Limonite (Hydrous ferric oxide mixture, FeO(OH)·nH2O)) — sedimentary

Limonite (Ironstone Concretion)

Limonite (Hydrous ferric oxide mixture, FeO(OH)·nH2O)

Bauxite (Pisolitic Bauxite) (Bauxite (mixture of Hydrous Aluminum Oxides)) — sedimentary

Bauxite (Pisolitic Bauxite)

Bauxite (mixture of Hydrous Aluminum Oxides)

Bauxite (Bauxite (mixture of Hydrous Aluminum Oxides)) — sedimentary

Bauxite

Bauxite (mixture of Hydrous Aluminum Oxides)

White Calcite (Calcium Carbonate (CaCO3)) — mineral

White Calcite

Calcium Carbonate (CaCO3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Limonite / Goethite pseudomorph (Hydrated Iron Oxide (FeO(OH)·nH2O)) — mineral

Limonite / Goethite pseudomorph

Hydrated Iron Oxide (FeO(OH)·nH2O)

Goethite / Limonite Gossan (Hydrated Iron Oxide (FeO(OH))) — sedimentary

Goethite / Limonite Gossan

Hydrated Iron Oxide (FeO(OH))

Limonite Boxwork / Iron Ore Concretion (FeO(OH)qnH2O (Hydrated iron oxide)) — sedimentary

Limonite Boxwork / Iron Ore Concretion

FeO(OH)qnH2O (Hydrated iron oxide)

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

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Limonite with Gossan / Iron Ore (Hydrated iron oxide-hydroxide, approximately FeO(OH)·nH2O) — mineral

Limonite with Gossan / Iron Ore

Hydrated iron oxide-hydroxide, approximately FeO(OH)·nH2O

Asphalt Pavement (with aggregate) (Asphalt concrete) — man-made composite

Asphalt Pavement (with aggregate)

Asphalt concrete

man-made composite

Sandstone (Quartz Sandstone (predominantly)) — Sedimentary

Sandstone

Quartz Sandstone (predominantly)

Conglomeratic concrete or asphalt aggregate surface with dark bituminous chunks (Polymictic gravel aggregate; dark pieces likely bitumen/asphalt, not a natural rock) — sedimentary

Conglomeratic concrete or asphalt aggregate surface with dark bituminous chunks

Polymictic gravel aggregate; dark pieces likely bitumen/asphalt, not a natural rock

Rhodochrosite (Manganese Carbonate (MnCO3)) — mineral

Rhodochrosite

Manganese Carbonate (MnCO3)

Hematite (Iron (III) Oxide (Fe2O3)) — mineral

Hematite

Iron (III) Oxide (Fe2O3)

Tumbled Hematite (Iron(III) oxide (Fe2O3)) — mineral

Tumbled Hematite

Iron(III) oxide (Fe2O3)

Bornite (Peacock Ore) (Bornite (Cu5FeS4)) — mineral

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Chrysocolla (with Hematite/Iron Oxides) (Chrysocolla: (Cu, Al)2H2Si2O5(OH)4 · nH2O) — mineral

Chrysocolla (with Hematite/Iron Oxides)

Chrysocolla: (Cu, Al)2H2Si2O5(OH)4 · nH2O

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

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Ferruginous Quartz (Silicon Dioxide (SiO2) with Iron Oxide (Limonite/Hematite)) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Limonite/Hematite)

Blue Apatite (Apatite group (Ca5(PO4)3(F,Cl,OH))) — mineral

Blue Apatite

Apatite group (Ca5(PO4)3(F,Cl,OH))

Chondrite Meteorite (Ordinary Chondrite (L or H type)) — igneous

Chondrite Meteorite

Ordinary Chondrite (L or H type)

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

Rough Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Chalcopyrite (Copper iron sulfide (CuFeS2)) — mineral

Chalcopyrite

Copper iron sulfide (CuFeS2)

Fire Opal (in matrix) (Hydrated Silica (SiO2·nH2O)) — Mineraloid

Fire Opal (in matrix)

Hydrated Silica (SiO2·nH2O)

Copper Ore (likely Chalcopyrite in Matrix) (Chalcopyrite (CuFeS2)) — mineral

Copper Ore (likely Chalcopyrite in Matrix)

Chalcopyrite (CuFeS2)

Concrete with Aggregate (Artificial Conglomerate (Cement and Aggregate)) — sedimentary

Concrete with Aggregate

Artificial Conglomerate (Cement and Aggregate)

Milky Quartz with Iron Staining (Silicon Dioxide (SiO2) with Hematite/Limonite) — mineral

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2) with Hematite/Limonite

Vanadinite (Vanadinite (Pb5(VO4)3Cl)) — mineral

Vanadinite

Vanadinite (Pb5(VO4)3Cl)

Limonite (Gossan) (FeO(OH)·nH2O (Hydrated Iron Oxide)) — mineral

Limonite (Gossan)

FeO(OH)·nH2O (Hydrated Iron Oxide)

Limonite / Brown Iron Ore (Hydrous Iron Oxide (FeO(OH)·nH2O)) — mineral

Limonite / Brown Iron Ore

Hydrous Iron Oxide (FeO(OH)·nH2O)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Limonite with Goethite (Iron Hydroxide Mixture (FeO(OH)·nH2O)) — mineral

Limonite with Goethite

Iron Hydroxide Mixture (FeO(OH)·nH2O)

Limonite Nodules / Goethite (Hydrated Iron Oxide-Hydroxide (FeO(OH)·nH2O / Fe2O3·nH2O)) — mineral

Limonite Nodules / Goethite

Hydrated Iron Oxide-Hydroxide (FeO(OH)·nH2O / Fe2O3·nH2O)

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

Quartz (Milky or Cloudy)

Silicon Dioxide (SiO2)

Azurite-Malachite (often called Azerite Malachite or Azurmalachite) (Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2CO3(OH)2)) — Mineral

Azurite-Malachite (often called Azerite Malachite or Azurmalachite)

Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2CO3(OH)2)