Gneiss
Gneiss
metamorphic
Category
Igneous, Metamorphic, Sedimentary
Browse igneous, metamorphic, sedimentary specimens identified by the Rock Identifier community.
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Gneiss
Gneiss
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Granitoid Gneiss with Feldspar Vein
Gneiss (High-grade Metamorphic Rock) with Potassium Feldspar (KAlSi3O8)
metamorphic
Greenschist
Greenschist (Chlorite-Epidote-Actinolite Schist)
metamorphic
Gneiss (Metamorphic Rock)
Gneiss (high-grade regional metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss (Metamorphic Cobble)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Greenschist
Greenschist facies rock (containing chlorite, actinolite, albite, and epidote)
metamorphic
Banded Gneiss
Gneiss (quartz-feldspar-biotite metamorphic rock)
metamorphic
Gneiss
Gneiss (high-grade metamorphic rock typically composed of quartz, feldspar, and mica)
metamorphic
Banded Gneiss / Metamorphic River Pebble
Gneiss (Foliated Metamorphic Rock)
metamorphic
Greenstone / Diabase Porphyry
Porphyritic Diabase (Micro-gabbro)
Igneous
Epidote
Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
mineral
Gneiss
Gneiss
metamorphic
River Pebble (Quartz-rich)
Silicon Dioxide (SiO2) with impurities
sedimentary
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
mineral
Milky Quartz (Druzy Geode fragment)
Silicon Dioxide (SiO2)
mineral
Pyrite in Quartz Matrix
Iron Disulfide (FeS2) in Silicon Dioxide (SiO2)
mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Decorative polished pebbles
Likely mixed quartz-rich lithologies, including quartzite, jasper, and/or basalt
mineral
Unidentified weathered rock fragments
Likely mixed silicate rocks; specific identification requires testing
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Iron-stained or Milky)
Silicon Dioxide (SiO2)
mineral
Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Multi-gemstone Quartz and Fluorite Bracelet
Silicon Dioxide (SiO2) and Calcium Fluoride (CaF2)
mineral
Quartz
Silicon Dioxide (SiO₂)
Mineral
Quartz / Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral