Metamorphic And Mineral

Browse metamorphic and mineral specimens identified by the Rock Identifier community.

Schist

Mica Schist

metamorphic

Unakite (Epidotized Granite)

Unakite; primarily composed of Epidote (Ca2(Al,Fe)3(SiO4)3(OH)), Orthoclase (KAlSi3O8), and Quartz (SiO2)

Metamorphic

Lapis Lazuli (polished cabochon/sphere)

Na8[Al6Si6O24]Sn with accessory minerals (Pyrite, Calcite)

metamorphic

Quartzite

Quartzite (Primary mineral: SiO2)

metamorphic

Banded Gneiss

Gneiss (variable mineral composition)

metamorphic

Aventurine (Green Quartz)

Quartz with Fuchsite inclusions (SiO2 with K(Al,Cr)2(AlSi3O10)(OH)2)

mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

mineral

Aventurine

Silicon Dioxide (SiO2 with inclusions of Fuchsite mica)

mineral

Specular Hematite with Quartz and Limonite

Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)

Mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

mineral

White Moonstone (Scolicite or White Feldspar var. )

Lattice-structure Silicate (KAlSi3O8)

mineral

Smoky Quartz

Silicon Dioxide (SiO2)

mineral

Amazonite

Microcline (KAlSi3O8) with lead impurities

mineral

Orange Calcite

Calcium Carbonate (CaCO3)

mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

mineral

Lazulite

Magnesium Aluminum Phosphate Hydroxide (MgAl2(PO4)2(OH)2)

mineral

Potassium Feldspar

Orthoclase (KAlSi3O8)

mineral

Smoky Quartz

Silicon Dioxide (SiO2)

mineral

Lapis Lazuli

Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)

metamorphic

Granite Gneiss

Gneiss (derived from granitic protolith)

metamorphic

Magnetite

Magnetite (Fe3O4)

Mineral

Quartz (Milky/Rose variety)

Silicon Dioxide (SiO2)

mineral

Gneiss (Stream-worn Cobble)

Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica)

metamorphic

White Quartz (Milky Quartz)

Quartz (Silicon Dioxide - SiO2)

mineral

Biotite (Black Mica)

Biotite - K(Mg,Fe)3(AlSi3O10)(OH)2

mineral

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

mineral

Yellow Quartz (Citrine/Yellow Jasper mix)

Silicon Dioxide (SiO2)

mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

mineral

Iolite (Cordierite)

Cordierite (Magnesium iron aluminum cyclosilicate), Mg2Al4Si5O18

metamorphic

Mica Group Minerals

There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).

Mineral