Migmatite
Migmatite (Mixed Rock)
metamorphic
Category
Mineral In Metamorphic Rock
Browse mineral in metamorphic rock specimens identified by the Rock Identifier community.
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Beryl (Emerald variety in host rock)
Be3Al2(SiO3)6 (Silicate mineral)
mineral
Likely tumbled quartz-rich pebble
Quartz (SiO₂), possibly a weathered quartzite or chalcedony pebble
mineral
Polished pegmatitic granite (likely graphic granite)
Coarse-grained granitic rock composed chiefly of quartz, feldspar, and biotite/hornblende
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Rose Quartz
Silicon Dioxide with trace inclusions of dumortierite or titanium (SiO2)
mineral
Epidosite
Epidosite (Metasomatic rock consisting mainly of Epidote and Quartz)
metamorphic
Greenschist
Greenschist facies rock (containing chlorite, actinolite, and epidote)
metamorphic
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2
Mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Iron-Stained Quartz/Quartzite
Silicon Dioxide (SiO2) with iron oxides (Limonite/Hematite)
metamorphic
Unakite
Epidote-Feldspar rock
Metamorphic Rock
Green Quartzite (Aventurine-like)
Quartzite (primarily SiO2 with chromium-rich mica or chlorite inclusions)
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Quartzite (River Pebble)
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Gold Ore in Matrix
Native Gold (Au) in Quartz/Limonite host rock
mineral
Gneiss (specifically a Hornblende Gneiss or Micaceous Gneiss)
Gneiss (metamorphic rock composed primarily of quartz, feldspar, and mafic minerals)
metamorphic
Green Aventurine
Aventurine (variety of Quartz - SiO2)
Mineral_Rock
Greenstone / Metabasalt
Metamorphosed Mafic Rock (Greenschist facies)
metamorphic
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Milky quartz with iron-oxide staining and matrix
Quartz, silicon dioxide (SiO₂), likely massive quartz
mineral
Milky quartz vein fragment
Quartz, silicon dioxide (SiO₂)
mineral
Green Slate (Greenstone)
Foliated Metamorphic Rock (rich in Chlorite/Epidote)
metamorphic
Serpentine (Serpentinite)
Antigorite, Lizardite, and Chrysotile: (Mg,Fe)3Si2O5(OH)4
metamorphic
Quartz (Iron-Stained Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Quartzite (or Quartz Slab)
SiO2 (Silicon Dioxide)
metamorphic
Serpentinite
Serpentinite (composed primarily of minerals in the Serpentine group: Chrysotile, Lizardite, and Antigorite)
metamorphic
Clear Quartz (Rock Crystal)
Crystalline Silicon Dioxide (SiO2)
gemstone
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Amphibolite
Amphibolite (rich in amphibole and plagioclase feldspar)
metamorphic
Greenstone
Greenschist / Meta-basalt
metamorphic
Greenstone
Metabasalt / Chlorite-Epidote Schist
metamorphic
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Graphite-veined Quartzite
Meta-sedimentary Quartzite with Carbonaceous/Graphitic Inclusions (SiO2 + C)
metamorphic
Lapis Lazuli
Lazurite with Calcite and Pyrite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2
metamorphic
Gneiss
Gneiss (Metamorphic rock dominated by Quartz, Feldspar, and various dark minerals)
metamorphic
Banded gneiss pebble
Gneiss, likely quartz–feldspar–mica gneiss
metamorphic
Rounded quartz-rich pebble
Likely microcrystalline quartz (SiO₂), possibly milky quartz or a pale quartzite fragment
mineral
Smoky Quartz with Hematite Inclusions
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Tree Agate
Dendritic Agate (Silicon Dioxide, SiO2 with chlorite inclusions)
mineral
Micaceous Rock (likely Muscovite Schist/Gneiss or a Muscovite-rich Specimen)
Predominantly Muscovite (KAl2(AlSi3O10)(F,OH)2), often found in rocks like Muscovite Schist or Muscovite Gneiss.
Metamorphic, Mineral (within a rock type)