Gneiss (Banded Gneiss)
Gneiss
Category
Browse metamorphic or sedimentary specimens identified by the Rock Identifier community.
Gneiss (Banded Gneiss)
Gneiss
Banded Gneiss
Gneiss
Pink Granite Gneiss
Granitic Gneiss
Metaconglomerate
Protolith: Conglomerate (comprising SiO2, Al2O3, etc.)
Schist
Mica Schist
Healer's Gold (Pyrite and Magnetite in Schist)
Magnetite (Fe3O4) and Pyrite (FeS2) in Mica Schist
Golden Mica Schist
Mica Schist (primarily Muscovite/Biotite with Quartz)
Gneiss
Gneiss
Gneiss (Schistose)
Gneiss
Ruby Zoisite
Anyolite (Ca2Al3(SiO4)3(OH) + Al2O3:Cr)
Gneiss
Gneiss
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
Quartz Vein in Sedimentary Matrix
Silicon Dioxide (SiO2) with host rock
River Quartzite / Tumble-Polished Quartz
Quartzite (SiO2)
Green Kyanite
Kyanite (Al2SiO5)
Red Jasper
Jasper (Silicon Dioxide Si₂O₃)
Red Jasper
Silicon Dioxide (SiO₂)
Yellow Jasper
Jasper (Silica-rich Microcrystalline Quartz, SiO2)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Yellow Quartzite (or Quartz River Pebble)
Silicon Dioxide (SiO2)
Quartz Vein in Host Rock
Quartz (SiO2) in Mafic or Sedimentary Matrix
Schist (Biotite Schist)
Biotite-bearing Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
Gneiss
Gneiss (High-grade Metamorphic Rock)
Graphite
Graphite (Native Carbon, C)
Anthracite Coal
Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)
Quartz Vein with Host Rock (Greywacke/Siltstone)
Silicon Dioxide (SiO2) within Clastic Sedimentary/Metamorphic Matrix
Graphite Schist
C (Carbonaceous Schist)
Mica Schist with Pyrite
Muscovite/Biotite Schist with Iron Sulfide (FeS2)
Jasper, Agate, Quartz Mix (Polished Beads)
SiO₂ (Silicon Dioxide) for Quartz. Jasper and Agate are cryptocrystalline varieties of Quartz.
Gneiss
Gneiss (High-grade Regional Metamorphism)
Greenstone / Graywacke
Metagraywacke or Chlorite Schist
Water and Silt (Sedimentary Environment)
Suspended Sediment / H2O (dihydrogen monoxide)
Granite Gneiss
Gneiss (High-grade metamorphic rock)
Gneiss
Gneiss (High-grade Metamorphic Rock)
Gneiss
High-grade metamorphic rock (Gneiss)
Magnetite
Magnetite (Fe3O4)
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(OH)2
Hematite
Iron(III) oxide (Fe2O3)
Banded Gneiss
Banded Orthogneiss or Paragneiss (Quartz-Feldspathic Gneiss)
White Marble
Recrystallized Calcite (CaCO3)
Hematite
Iron(III) oxide (Fe2O3)
Pyrite
Iron Sulfide (FeS2)