Weathered garnet-bearing gneiss
Quartz–feldspar–mica gneiss with almandine garnet, chiefly Fe₃Al₂(SiO₄)₃
metamorphic
Category
Mineral In Metamorphic Rock
Browse mineral in metamorphic rock specimens identified by the Rock Identifier community.
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Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Quartz-veined Metamorphic Rock
Quartz-veined Schist or Gneiss
metamorphic
Banded Gneiss Pebble
Gneiss (Metamorphic Rock)
metamorphic
Mixed Mineral Assortment (Pyrite, Kyanite, Agate, Jasper)
FeS2 (Pyrite), Al2SiO5 (Kyanite), SiO2 (Agate/Jasper)
mineral
Rough Apatite in Matrix
Fluorapatite / Chlorapatite / Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Quartz in Matrix (Lepidolite or Quartzite)
Silicon Dioxide (SiO2) with host rock
mineral
Schist
Schist (Foliated Metamorphic Rock)
metamorphic
Quartz-Veined Gneiss or Metamorphic Rock with Quartz Veins
Quartz-veined metamorphic rock (Silicate mineral assemblage)
metamorphic
Schist
Schist
metamorphic
Quartz Veined Mudstone
Metasedimentary rock with Quartz (SiO2) veins
metamorphic
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)3Si3O10(OH)2)
metamorphic
Biotite Mica Schist
Metamorphic Rock containing Biotite K(Mg,Fe)3AlSi3O10(OH)2
metamorphic
Banded Slate
Slate (Metamorphosed Siltstone/Mudstone)
metamorphic
Foliated Metamorphic Rock (likely Gneiss or Schist)
Gneissic Metamorphic Rock
metamorphic
Sandstone or Quartzite
Arenite (if sedimentary) / Quartzite (if metamorphic)
Sedimentary or Metamorphic
Schist
Mica Schist (Medium-grade metamorphic rock)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Fuchsite
Chromium-rich Muscovite Mica
mineral
Slate
Foliated Metamorphic Rock
metamorphic
Dark gray metamorphic rock, likely hornfels or fine-grained amphibolite
Hornfels/amphibolite; commonly quartz, feldspar, amphibole, biotite, and minor sulfides
metamorphic
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
River Pebble (Gneiss/Schist mix)
Metamorphic rock aggregate
metamorphic
Quartz with Schist Inclusion
Crystalline Silicon Dioxide (SiO2) with Muscovite/Biotite Schist
metamorphic
Milky Quartz with Chlorite Schist Inclusions
Quartz (SiO2) with Chlorite Group silicates (typically (Mg,Fe)3(Si,Al)4O10(OH)2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Quartz with Mica/Schist inclusion
Silicon Dioxide (SiO2) with Phyllosilicates
mineral
Veined quartz-bearing metamorphic rock
Likely quartzite or siliceous schist with iron-oxide staining
metamorphic
Gneiss with Quartz Vein
Metamorphic Gneiss with Quartz (SiO2) and Feldspar Injection
metamorphic
Gneiss
Gneiss (Metamorphic rock)
metamorphic
Mica-rich metamorphic rock, likely schist
Biotite–muscovite schist, possibly garnet-bearing
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Blue Apatite
Calcium phosphate mineral, Ca5(PO4)3(F,Cl,OH)
mineral
Weathered, quartz-rich metamorphic rock (likely schist or gneiss)
Quartz–feldspar–mica schist/gneiss, with surface lichens and iron-oxide staining
metamorphic
Gneiss
Foliated Metamorphic Rock
metamorphic
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Dark gray foliated metamorphic rock, likely slate or phyllite
Slate/phyllite; commonly quartz, muscovite/illite, chlorite, and graphite or carbonaceous matter
metamorphic
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Wavellite with Quartz
Al3(PO4)2(OH,F)3 & SiO2
mineral
Weathered quartz-rich metamorphic rock (probable quartzite)
Quartzite; predominantly microcrystalline quartz (SiO₂), with possible mica, feldspar, and iron-oxide impurities
metamorphic