Greenstone
Metabasalt / Greenschist facies rock
metamorphic
Category
Igneous And Metamorphic
Browse igneous and metamorphic specimens identified by the Rock Identifier community.
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Biotite Gneiss
Gneiss (complex mixture including Biotite K(Mg,Fe)3AlSi3O10(F,OH)2 and Quartz/Feldspar)
metamorphic
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Mica Schist / Granite
Mica Schist (Silicate metamorphic rock)
metamorphic
Milky Quartz
Quartz / Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss (specifically Amphibolite Gneiss)
Gneiss
metamorphic
Quartz Vein in Host Rock
Quartz (SiO2) in Mafic or Sedimentary Matrix
igneous
Muscovite
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
River-worn Quartzite / Soapstone
Metamorphic Rock (Quartzite/Talc-schist)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Milky Quartz with Mica Matrix
SiO2 (Silicon Dioxide) with Muscovite/Biotite mica
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Red Garnet Gemstone
Pyrope-Almandine Garnet (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)
gemstone
Quartz with Mafic/Chlorite Veins
Silicon Dioxide (SiO2) with Chlorite/Epidote cross-veining
metamorphic
Veined Quartz
SiO2 (Silicon Dioxide)
Mineral
Gneiss
Gneiss
metamorphic
Quartz Vein / Quartzite with Iron Oxide Staining
Silicon Dioxide (SiO2)
mineral
Graphite
Graphite (Carbon, C)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Diorite (Gneissic)
Diorite
igneous
Green Gneiss or Greenschist
Chlorite/Actinolite Gneiss or Schist
metamorphic
Quartz with Mica inclusions (likely Schist or Gneiss host)
Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)
metamorphic
Gneiss
Gneiss
metamorphic
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2 (Tremolite-Actinolite series)
metamorphic
Dark metamorphic rock, likely hornfels or fine-grained basalt
Probable hornfels; commonly quartz–feldspar–mica with variable amphibole/pyroxene
metamorphic
Gneiss
Gneiss
metamorphic
Biotite mica schist (probable)
Mica schist, dominated by biotite mica (K(Mg,Fe)₃AlSi₃O₁₀(F,OH)₂) with quartz and feldspar
metamorphic
Weathered granite or granitic gneiss
Granite; primarily quartz, feldspar, and mica (exact identification uncertain from the photo)
igneous
Quartz Vein in Schist
Quartz-rich Micaceous Schist (SiO2 + phyllosilicates)
metamorphic
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Greenshist / Chlorite Schist
Chlorite schist (contains (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)
metamorphic
Banded Gneiss
Banded Gneiss (High-grade Metamorphic Rock)
metamorphic
Schist (Greenschist / Mica Schist)
Metamorphic rock rich in platy minerals (e.g., Chlorite/Mica schist)
metamorphic
Gneiss (with Granite/Pegmatite Vein)
Foliated Metamorphic Rock (Quartz-Feldspar Gneiss)
metamorphic
Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
metamorphic
Banded gneiss (likely amphibolite-bearing gneiss)
Gneiss; quartz–feldspar–mica/amphibole aggregate
metamorphic
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Small pale mineral fragment
Unidentified; possibly quartz, calcite, or feldspar
mineral
Coarse-grained granite or granitic gneiss
Granite; primarily quartz, potassium feldspar, plagioclase, and biotite/hornblende
igneous
Dark rounded pebble, likely basalt
Basalt (fine-grained mafic volcanic rock; commonly plagioclase, pyroxene, and olivine)
igneous