Gneiss
Gneiss
metamorphic
Category
Sedimentary And Igneous (Mixed)
Browse sedimentary and igneous (mixed) specimens identified by the Rock Identifier community.
Learn about Sedimentary And Igneous (Mixed) in the encyclopedia
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Pyrite
Iron Sulfide (FeS2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneissic Metamorphic Rock
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Gneiss
Gneiss
metamorphic
Kambaba Jasper
Rhyolite (Volcanic rock) or Stromatolite (debated)
Igneous/Sedimentary (debated)
Quartz (Milky/Gray variety)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Gneiss
Gneiss
metamorphic
Quartz / Common Agate
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz / Quartz Geode fragment
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
River Pebble (Gneiss or Quartzite mixture)
Metamorphic rock (Commonly Gneissic)
metamorphic
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace impurities
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz Pebble
Silicon dioxide (SiO2)
sedimentary
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Banded Agate
Cryptocrystalline Quartz (SiO2)
sedimentary
Agate
Cryptocrystalline Quartz (SiO2)
sedimentary
Banded Agate (Onyx variant)
Silicon dioxide (SiO2)
sedimentary
Magnetite
Magnetite (Fe3O4)
Mineral
Quartz
Silicon Dioxide (SiO2)
Mineral
Weathered foliated metamorphic rock, likely gneiss or schist
Quartz–feldspar–mica metamorphic rock; exact identification requires a fresh surface and mineral tests
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz-veined Metamorphic Pebble
Silicate-rich metamorphic rock with quartz veins (SiO2)
metamorphic
Hematite
Hematite (Fe2O3)
mineral
White Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Feldspar
Aluminosilicate (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral