Milky Quartz with Schist Matrix
Silicon Dioxide (SiO2) with Mica Schist Matrix
mineral
Category
Metamorphic (Likely Gneiss Or Schist Based On Texture)
Browse metamorphic (likely gneiss or schist based on texture) specimens identified by the Rock Identifier community.
Learn about Metamorphic (Likely Gneiss Or Schist Based On Texture) in the encyclopedia
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Sandstone (likely Red/Brown Sandstone)
Arenite (SiO2 based)
sedimentary
Gneiss
Gneiss
metamorphic
Granitic Gneiss Pebble
Gneiss (felsic metamorphic rock)
metamorphic
Chert (specifically Jasper/Flint pebble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Mixed Mineral Collection (with Quartz, Beryl, and host rock)
Silicon Dioxide (Quartz), Be3Al2Si6O18 (Beryl), and associated Schist/Pegmatite
mineral
Greenschist
Chlorite-actinolite schist
metamorphic
Banded Gneiss Pebble
Gneiss (Metamorphic Rock)
metamorphic
Schist with Garnet inclusions
Garnet-mica-schist
metamorphic
Fossil / Permineralized Bone
Tyrannosaurus rex fossil (Hydroxylapatite replaced by various minerals)
sedimentary
Gneiss
Gneiss
metamorphic
Veined quartz-bearing metamorphic rock
Likely quartzite or siliceous schist with iron-oxide staining
metamorphic
Probable weathered granite or granitic gneiss
Granite/granitic gneiss; mainly quartz, feldspar, and mica
igneous
Gneiss
Gneiss
metamorphic
Schist
Mica Schist (predominantly Muscovite/Biotite)
metamorphic
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Sandstone with Manganese Dendrites
Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)
sedimentary
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
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
Green Aventurine
Aventurine Quartz (SiO2 with fuchsite inclusions)
Mineral
Schist (Greenschist / Mica Schist)
Schist (variable mineral composition, commonly containing quartz, feldspar, mica, chlorite)
metamorphic
Glacial granite/granitoid boulder
Granite to granodiorite; chiefly quartz, feldspar, and biotite/hornblende
igneous
Gneiss
Metamorphic Gneiss
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Greenschist
Greenschist (Chlorite Schist)
metamorphic
Greenschist
Greenschist (chlorite schist)
metamorphic
Schist
Crystalline Metamorphic Rock (Schistose)
metamorphic
Smooth gray river pebble
Likely fine-grained sandstone or siltstone; exact identification requires a fresh surface and tests
sedimentary
Granite Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
N/A (This is a digital image of a bar graph)
Digital Data Visualization (Bar Chart)
This is not a rock or mineral
Gneiss (Granitic Gneiss)
Gneiss (composed mainly of quartz, K-feldspar, plagioclase, and biotite)
metamorphic
Gneiss and Igneous Rock Collection
Foliated Metamorphic Rock (Gneiss) / Igneous Rocks
metamorphic
Schist
Mica Schist
metamorphic
Sandstone Pebble
Arenite (SiO2 based)
sedimentary
Quartzite with Iron Inclusions
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Green Kyanite
Kyanite (Al2SiO5)
mineral
Grey River Stone (Gneiss/Schist mix)
Foliated Metamorphic Rock (variable mineral formula)
metamorphic
Potassium Feldspar (Orthoclase)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Mica Schist with Quartz
Mica Schist (Quartz-Muscovite Schist)
metamorphic