Banded Gneiss
Gneiss (Metamorphic high-grade, predominantly SiO2, Al2O3, K2O, Na2O)
metamorphic
Category
Sedimentary And Igneous (Mixed)
Browse sedimentary and igneous (mixed) specimens identified by the Rock Identifier community.
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Pyrite (on Quartz matrix)
Iron Sulfide (FeS2)
mineral
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Mica-rich Schist fragment
Mica Schist
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Gneiss (specifically Micaceous Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Quartz (Milky or Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Cryptocrystalline Quartz (Agate/Chert)
Silicon dioxide (SiO2)
sedimentary
Botryoidal Chalcedony (Agate/Desert Rose Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz with Mica inclusions (likely Schist or Gneiss host)
Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)
metamorphic
Dyed Pink Agate Slice
Cryptocrystalline variety of Quartz (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO₂)
mineral
Greenschist
Chlorite schist
metamorphic
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Rough Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Gneiss (with Quartzite and Biotite)
Gneiss containing SiO2 (Quartz), K(Mg,Fe)3AlSi3O10(OH)2 (Biotite), and (K,Na,Ca)AlSi3O8 (Feldspar)
metamorphic
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Common Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Cloudy variety)
Silicon Dioxide (SiO2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
Mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
mineral
Gneiss
Gneiss
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Pyrite (Cube variety)
Iron Sulfide (FeS2)
mineral
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Galena
Lead Sulfide (PbS)
mineral
Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral