Gneiss
Gneiss (High-grade metamorphic rock)
Category
Browse man made rock (sedimentary analogue) specimens identified by the Rock Identifier community.
Gneiss
Gneiss (High-grade metamorphic rock)
Garnet in Host Rock
Garnet Group (A3B2(SiO4)3)
Turquoise in Matrix
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Gneissic Schist
Foliated Metamorphic Rock (Schist/Gneiss transition)
Chert (specifically Agate/Jasper variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Red Jasper
Red Jasper (SiO2 with Fe2O3 impurities)
Puddingstone (Gowganda)
Gowganda Formation Conglomerate
Granite Gneiss with Garnet
Garnetiferous Gneiss
Sandstone
Arenite (predominantly SiO2)
Chert (includes Flint & Jasper)
Chert (Siliceous sedimentary rock, chemical formula SiO2)
Limestone with Chert or Siltstone bands
Sedimentary carbonate rock (CaCO3) often with siliceous impurities
Fossiliferous Shale Matrix
Clastic Sedimentary Rock with Brachiopod or Mollusk shell fragments
Quartz Geode in Chert/Limestone Matrix
Silicon Dioxide (SiO2) within Sedimentary Host Rock
Chert
Siliceous sedimentary rock (predominantly microcrystalline quartz, SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Gneiss
Gneiss
Gneiss
Gneiss (High-grade metamorphic rock)
Gneiss
Gneiss (high-grade metamorphic rock)
Pyrite (on host rock)
Iron Sulfide (FeS2)
Jasper-Agate Breccia
Silicon Dioxide (SiO2) with iron oxide inclusions
Quartz Geode
Silicon Dioxide (SiO2)
Quartz Geode (Druzy Quartz)
Silicon Dioxide (SiO2)
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
Graphite Schist
C (Carbonaceous Schist)
Dendrite (Manganese Oxide Dendrites)
Psilomelane or Pyrolusite on Matrix (typically MnO2)
General Rock and Mineral Collection (Center: Angelite / Blue Anhydrite)
Anhydrite (Calcium Sulfate, CaSO4)
Banded Sandstone (Liesegang Rings)
Arenite with Liesegang rings (SiO2/Fe2O3)
Agate (Crazy Lace or Eye Agate)
Silicon Dioxide (SiO2)
Sandstone (Muddy/Silty Variety)
Arenite with high silt/clay content (clastic sedimentary rock)
Wonderstone Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Sandstone (Ferruginous Concretion)
Ferruginous Sandstone Concretion / SiO2 with Fe2O3 cement
Jasper
Silicon dioxide (SiO2)
Coquina
Bioclastic Limestone
Brecciated Chert
Sedimentary Chert (SiO2) with Calc-Silicate mineralization
Agate (Puddingstone style)
Silicon Dioxide (SiO2) with impurities
Muscovite Mica
Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))
Gneiss (High-grade Metamorphic Rock)
Gneiss (Metamorphic silicate rock)
Quartz Geode
Silicon Dioxide (SiO2)
Chalcedony (Botryoidal/Agate nodule)
Microcrystalline Quartz (SiO2)
Banded Agate (with Quartz Geode Center)
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Red Sandstone
Arenite (Ferruginous Sandstone)