Sandstone
Arenite
Category
Browse sedimentary (man made composite) specimens identified by the Rock Identifier community.
Sandstone
Arenite
Sandstone
Arenite (with iron oxide cement)
Purple Turquoise (Composite Mojave Turquoise)
CuAl6(PO4)4(OH)8·4H2O (Hydrated copper aluminum phosphate composite)
Coquina
Bioclastic Limestone
Native Silver
Silver (elemental Ag)
Sandstone
Arenite (primarily SiO2)
Chert (Flint)
Silicon dioxide (SiO2)
Unakite
Unakite (Epidotized Granite)
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
Nickel coin (U.S. currency)
Cupronickel (75% Copper, 25% Nickel alloy)
Unakite
Epidotized Granite
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite
Chert (variations include Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Limpets Shell / Fossil Specimen
Patellogastropoda (Class)
Sandstone
Arenite
N/A - Man-made object (Jewelry Chain)
Antiqued or Oxidized Metal Chain (often Steel or Brass)
Man-made Jewelry Charm (Enameled Metal)
Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.
Cullet Glass (Man-made Glass Slag)
Amorphous Silica (SiO2) with chemical additives
Flint
SiO2 (Cryptocrystalline Quartz)
Granite
Granite (Phaneritic Quartz-Feldspar-Mica composite)
Diamond (or Diamond Simulant)
Carbon (C)
Chert (White Chert/Flint)
Microcrystalline Quartz (SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone (Water-worn Cobble)
Arenite (SiO2 with CaCO3 or Fe2O3 cement)
Diamond (in jewelry setting)
Diamond (C - Carbon)
Blue quartzite or blue aventurine glass-like aggregate
Quartzite, predominantly SiO₂ (identification uncertain from image)
Diamond (in a gold ring)
Diamond (pure carbon, C)
Man-made Green Quartz (Lab-grown or Treated)
Silicon Dioxide (SiO2) with artificial coloration
Gypsum (Satin Spar / Alabaster variety)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
Feldspar-Quartz Rock (likely Pegmatite or Granite)
Feldspar-Quartz composite rock (KAlSi3O8 - SiO2)
Unakite
Unakite Epidosite (composite of Epidote, Orthoclase, and Quartz)
Sandstone
Arenite
Sandstone
Arenite (mostly SiO2)
Sandstone
Arenite (SiO2 primarily)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone
Arenite (SiO2 based)
Chert (varietal: Flint/Jasper)
Silicon Dioxide (SiO2)
Coquina
Bioclastic Limestone (composed primarily of CaCO3)