Rock Identifier

Category

Mineral Specimen

Browse mineral specimen specimens identified by the Rock Identifier community.

Learn about Mineral Specimen in the encyclopedia

Emerald in Matrix

Emerald in Matrix

Aquamarine Matrix

Aquamarine Matrix

Morganite Crystal

Morganite Crystal

Emerald Crystal

Emerald Crystal

Aquamarine Crystal

Aquamarine Crystal

Mushroom Tourmaline

Mushroom Tourmaline

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Desert Rose (Gypsum variety selenite (CaSO4 · 2H2O)) — mineral

Desert Rose

Gypsum variety selenite (CaSO4 · 2H2O)

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

Chrysocolla

(Cu,Al)2H2Si2O5(OH)4·nH2O

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Vein Rock (Silicon Dioxide (SiO2)) — mineral

Quartz Vein Rock

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Likely magnetite-bearing rock (Magnetite (Fe₃O₄), possibly in a mafic host rock) — igneous

Likely magnetite-bearing rock

Magnetite (Fe₃O₄), possibly in a mafic host rock

Clear quartz (rock crystal) (Quartz, silicon dioxide (SiO₂)) — mineral

Clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Citrine (Heat-treated Amethyst) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine (Heat-treated Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz with Pyrite (Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)) — mineral

Quartz with Pyrite

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Chrysocolla (Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla

Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O

Garnet (Almandine-Pyrope) (Almandine-Pyrope Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3) — mineral

Garnet (Almandine-Pyrope)

Almandine-Pyrope Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3

Chalcopyrite (Copper Iron Sulfide (CuFeS2)) — mineral

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

Chalcopyrite (CuFeS2) — mineral

Chalcopyrite

CuFeS2

Galena (Lead sulfide (PbS)) — mineral

Galena

Lead sulfide (PbS)

Marcasite Sun (Marcasite (FeS2)) — mineral

Marcasite Sun

Marcasite (FeS2)

White coral limestone (probable fossiliferous limestone) (Calcite (CaCO₃), commonly derived from aragonitic coral skeletons recrystallized to calcite) — sedimentary

White coral limestone (probable fossiliferous limestone)

Calcite (CaCO₃), commonly derived from aragonitic coral skeletons recrystallized to calcite

Sulphur (Sulfur (S)) — mineral

Sulphur

Sulfur (S)

Muscovite (Muscovite mica, KAl2(AlSi3O10)(OH)2) — mineral

Muscovite

Muscovite mica, KAl2(AlSi3O10)(OH)2

Olivine ((Mg,Fe)2SiO4) — mineral

Olivine

(Mg,Fe)2SiO4

Orpiment (Arsenic Trisulfide (As2S3)) — mineral

Orpiment

Arsenic Trisulfide (As2S3)

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

Epidote

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

Yellow Ochre (Goethite-rich clay (Hydrated Iron Oxide: FeO(OH)·nH₂O)) — mineral

Yellow Ochre

Goethite-rich clay (Hydrated Iron Oxide: FeO(OH)·nH₂O)

Garnet (Almandine/Pyrope Garnet (X3Y2(SiO4)3)) — mineral

Garnet

Almandine/Pyrope Garnet (X3Y2(SiO4)3)

Muscovite Mica (Muscovite, KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica

Muscovite, KAl2(AlSi3O10)(OH)2

Serpentine ((Mg,Fe)3Si2O5(OH)4) — metamorphic

Serpentine

(Mg,Fe)3Si2O5(OH)4

Quartz Druzy (Silicon Dioxide (SiO2)) — mineral

Quartz Druzy

Silicon Dioxide (SiO2)

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

Garnet

Almandine (Fe3Al2(SiO4)3)

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

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Almandine Garnet (Fe3Al2(SiO4)3) — mineral

Almandine Garnet

Fe3Al2(SiO4)3

Galena (Lead Sulfide (PbS)) — mineral

Galena

Lead Sulfide (PbS)

Muscovite Mica (Muscovite (KAl2(AlSi3O10)(OH)2)) — mineral

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Amethyst with Quartz Cluster (Silicon Dioxide (SiO2)) — mineral

Amethyst with Quartz Cluster

Silicon Dioxide (SiO2)

Copper Ore (Cupriferous rock mixture (contains Chalcopyrite and Bornite)) — igneous

Copper Ore

Cupriferous rock mixture (contains Chalcopyrite and Bornite)

Mica (Phyllosilicate group (e.g., Biotite or Muscovite)) — mineral

Mica

Phyllosilicate group (e.g., Biotite or Muscovite)

Mixed Quartz and Mineral Gravel (Silicon Dioxide (SiO2) and assorted silicate minerals) — mineral

Mixed Quartz and Mineral Gravel

Silicon Dioxide (SiO2) and assorted silicate minerals

Herkimer Diamond (Quartz (Silicon Dioxide, SiO2)) — mineral

Herkimer Diamond

Quartz (Silicon Dioxide, SiO2)

Feldspar in Matrix (Feldspar group minerals in metamorphic or igneous matrix) — igneous

Feldspar in Matrix

Feldspar group minerals in metamorphic or igneous matrix