Gneiss (with Quartzite and Mica)
Gneiss
metamorphic
Category
Igneous And Sedimentary Mixture
Browse igneous and sedimentary mixture specimens identified by the Rock Identifier community.
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Carnelian Agate
Carnelian (SiO2 with iron oxide impurities)
mineral
Banded Agate (Pink Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Quartz (Clear/White)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
White Quartz Pebbles
Quartz (Silicon Dioxide, SiO2)
Mineral
Fluorite (Blue)
Calcium Fluoride (CaF2)
mineral
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Blue Calcite
Calcium Carbonate (CaCO3)
Mineral
Banded Gneiss
Gneiss (high-grade metamorphic silicate rock)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Milky or Cloudy Quartz)
Silicon Dioxide (SiO2)
mineral
Amethyst with Marcasite accents
Amethyst (Silicon Dioxide SiO2) and Marcasite (Iron Sulfide FeS2)
mineral
Hematite (Tumbled)
Iron(III) oxide (Fe2O3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Conglomerate with Quartz Inclusions
Conglomerate (clastic sedimentary rock) with internal Quartz (SiO2)
sedimentary
Arkosic Sandstone (or Conglomeritic Sandstone fragment)
Arkose (rich in feldspar)
sedimentary
Coarse Sand Grain / Lithic Fragment
Clastic Sediment (Lithic fragment or Quartz/Feldspar grain)
sedimentary
Quartz / Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Gneiss (specifically Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
High-grade foliated metamorphic rock
metamorphic
Turquoise and Hematite
CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Fe2O3 (Hematite)
mineral
Pyrite in Matrix (Commonly called Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Grey Chalcedony (Tumbled)
Chalcedony (SiO2)
mineral
Quartz
Silicon Dioxide (SiO₂)
Mineral
Milky Quartz (or Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Common Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO₂)
mineral
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Pyrite (Iron Pyrite)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Granite Gneiss
Felsic Gneiss
metamorphic
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Hematite
Ferric oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Clear Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral