Red Sandstone
Arenite (primarily SiO2 with Fe2O3)
Category
Browse man made rock (sedimentary analogue) specimens identified by the Rock Identifier community.
Red Sandstone
Arenite (primarily SiO2 with Fe2O3)
Specular Hematite
Hematite (Fe2O3)
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Ruby in Kyanite
Al2O3 (Corundum) in Al2SiO5 (Kyanite-Fuchsite-Quartz)
Conglomerate
Conglomeratic Sandstone / Sedimentary Breccia
Schist
Mica Schist
Sandstone with trace fossil
Sandstone, possibly with Skolithos or similar trace fossil
Hag Stone
Perforated Flint or Chert (SiO2)
Fossilized Favosites (Honeycomb Coral)
Favosites (extinct genus of tabulate coral)
Ironstone Concretion
Siderite or Ferruginous Concretion (FeCO3 or Iron Oxides)
Fossilized Coral
Cnidaria (Anthozoa), often replaced by Calcium Carbonate (CaCO3) or Silica (SiO2)
Fossil Shell in Sedimentary Matrix
Bivalvia (fossil) in Calcium Carbonate Matrix
Sandstone
Arenite (a specific type of sandstone with less than 15% matrix)
Wonderstone (Banded Rhyolite)
Rhyolite (Silicon Dioxide with Iron Oxide impurities)
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Dalmatian Stone
Dalmatian Jasper (Peralkaline Quartz-Feldspar Rock)
Sandstone
Arenite (composed primarily of SiO2)
Gneiss
Gneissic Metamorphic Rock
Carnelian (Orange Agate)
Silicon Dioxide (SiO2)
Blue Agate (Dyed)
Silicon Dioxide (SiO2)
Green Jasper with Agate Banding
Silicon Dioxide (SiO2) with impurities of ferrous silicate or chlorite
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminium phosphate)
Clear Quartz Crystal
Silicon Dioxide (SiO2)
Chalcedony (Agate/Carnelian precursor)
Chalcedony (Silicon Dioxide, SiO2)
Sandstone
Arenite (SiO2 based)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Banded Gneiss
Gneiss (complex metamorphic silicate rock)
Sandstone (with vugs)
Arenite / Sedimentary Sandstone
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Turquoise
Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Jasper and Agate
Microcrystalline Quartz (SiO2)
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
Limestone Breccia
Sedimentary Breccia (Calcareous)
Chert (Chalk-associated Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Dalmatian Stone
Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite
Conglomerate
Conglomerate
Banded River Rock with Quartz Vein
Siltstone/Greywacke with Quartz (SiO2)
Quartz Vein in Siltstone
SiO2 (Quartz) on clastic sedimentary matrix
Gneiss
Gneiss
Geode (unopened)
Calcedony-lined Geode (SiO2)