Mica
Mica group (often Muscovite or Biotite)
mineral
Category
Metamorphic Mineral
Browse metamorphic mineral specimens identified by the Rock Identifier community.
Learn about Metamorphic Mineral in the encyclopedia
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Polished Stone Pendant (Identity Unclear)
Unknown (Possibly Jasper/Agate/Quartz mixture)
mineral
Yellow Sapphire or Citrine
Al2O3 (Corundum) or SiO2 (Quartz)
mineral
Green Tourmaline
Elbaite (part of Tourmaline group), Na(Li1.5Al1.5)Al6Si6O18(BO3)3(OH)4
mineral
Gneissic Schist
Gneiss-schist (Metamorphic rock)
metamorphic
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Iron-stained garnet-bearing rock, possibly almandine garnet
Garnet-group silicate, likely almandine (Fe₃Al₂Si₃O₁₂), in a quartz–iron-oxide matrix
mineral
Green Tourmaline (Verdelite) / Actinolite
Tourmaline group: Na(Mg,Fe,Li,Al,Mn)3Al6(BO3)3Si6O18(OH)4 / Actinolite: Ca2(Mg,Fe)5Si8O22(OH)2
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Greenschist
Chlorite schist
metamorphic
Serafina (Serafinite / Clinochlore)
Clinochlore (Mg5Al)(AlSi3O10)(OH)8
mineral
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
mineral
Quartz with Mica
Silicon Dioxide (Quartz, SiO2) with Muscovite/Biotite Mica
mineral
Gneiss (Metamorphosed Granitic Rock)
Gneiss (composed mainly of quartz, feldspar, biotite, and/or hornblende)
metamorphic
Hypersthene (or Enstatite/Ferrosilite)
Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)
Mineral
Foliated metamorphic rock, likely mica schist
Mica schist, mainly quartz–feldspar–mica assemblage
metamorphic
Muscovite mica
Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂
mineral
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Mineral
Greenstone
Metabasalt / Chlorite-actinolite-epidote schist
metamorphic
Red Garnet
Pyrope or Almandine (X3Y2(SiO4)3)
mineral
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Black Sand (Magnetite Sand)
Magnetite (Fe3O4)
mineral
Quartz-Veined Slate or Greenstone
Metamorphic rock with quartz vein (SiO2)
metamorphic
Almandine Garnet in Schist
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
metamorphic
Ruby Fuchsite / Ruby in Fuchsite
Ruby (Al2O3 variety corundum) and Fuchsite (K(Al,Cr)2AlSi3O10(OH)2 - a chromium-rich variety of muscovite mica) in Quartz matrix
Mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Quartz with Mica/Host Rock
Silicon Dioxide (SiO2) with Phyllosilicates
mineral
Vein-bearing metamorphic rock, likely gneiss or schist
Banded silicate rock; likely quartz–feldspar–mica gneiss with a quartz vein
metamorphic
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Quartz with Schist Matrix
Crystalline Silicon Dioxide (SiO2) in micaceous schist
metamorphic
Eclogite
Eclogite (Omphacite + Pyrope)
metamorphic
Granitic Pegmatite
Granitic Pegmatite (principally Quartz, Potassium Feldspar, and Mica)
igneous
Slate
Foliated Metamorphic Rock
metamorphic
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Banded gneiss
Gneiss, likely biotite–quartz–feldspar gneiss
metamorphic
Quartzite Pebble (with mineral veining)
Metamorphic Quartzite (SiO2)
metamorphic
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
mineral
Tumbled banded gneiss or amphibolite
Banded metamorphic rock, likely quartz–feldspar–biotite gneiss with amphibole
metamorphic
Garnet (Almandine variety)
Almandine Garnet (Fe3Al2(SiO4)3)
mineral