Quartz-veined Gneiss
Gneiss with Quartz (SiO2) intrusions
Category
Browse sedimentary or metamorphic derived specimens identified by the Rock Identifier community.
Quartz-veined Gneiss
Gneiss with Quartz (SiO2) intrusions
Gneiss (specifically Banded Gneiss)
Gneiss
Banded Gneiss
Gneiss (Metamorphic high-grade, predominantly SiO2, Al2O3, K2O, Na2O)
Gneiss
Gneiss (high-grade metamorphic rock)
Pietersite
Brecciated Crocidolite in Quartz (Chalcedony)
Gneiss (specifically Micaceous Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
Epidote with Magnetite/Hematite inclusions
Epidote (Ca2(Al2,Fe3+)(SiO4)3(OH)) with Iron Oxides
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Green Aventurine and Clear Quartz
Aventurine (variety of Quartz - SiO2) and Quartz (SiO2)
Magnetite (Iron Ore)
Magnetite (Fe3O4)
Schist (Kyanite Schist)
Kyanite-Mica Schist (primarily Al2SiO5, KAl2(AlSi3O10)(OH)2, and SiO2)
Blue Kyanite
Kyanite (Al2SiO5)
Graphite
Graphite (Native Carbon, C)
Green Aventurine (Green Quartzite)
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
Gneiss
Gneiss (High-grade metamorphic rock)
Gneiss
Gneiss
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Quartzite
Quartzite (primarily SiO2)
Kyanite (Purple variety)
Kyanite (Al₂SiO₅)
Garnet in Schist (Garnetiferous Micaceous Schist)
Almandine Garnet, Fe3Al2(SiO4)3
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
Quartzite
Quartzite (SiO2 silicon dioxide)
Kyanite in Quartz
Kyanite (Al2SiO5) with Quartz (SiO2)
Garnet Schist
Garnetiferous Micaceous Schist
Marble
Metamorphosed Limestone (calcite formulation CaCO3)
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 - Muscovite component)
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
Garnet Schist
Garnetiferous Micaceous Schist
Aventurine Quartz
Silicon Dioxide (SiO2) with Fuchsite inclusions
Gneiss
Gneiss (High-grade metamorphic rock)
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
Granitic Gneiss
Gneiss (High-grade regional metamorphic rock)
River Rock (likely Gneiss or Quartzite)
Metamorphic rock specimen (potentially Foliated Gneiss)
Gneiss (Granitic Gneiss)
Gneiss
River Pebble (Gneiss or Granite)
Metamorphic Rock (likely Gneiss or Granitic composition)
Quartzite Geode or Crystalline Quartz Node
Silicon Dioxide (SiO2)
Quartz (Milky or Yellowish)
Silicon Dioxide (SiO2)
Pyrite
Iron Disulfide (FeS2)
Clear Quartz
Silicon Dioxide (SiO2)
White Quartz Star
Silicon Dioxide (SiO2)