Sandstone
Arenite (SiO2 based)
sedimentary
Category
Mineral Based Alloy (Anthropogenic)
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
Learn about Mineral Based Alloy (Anthropogenic) in the encyclopedia
View all →
Sandstone (likely Quartz Sandstone)
Arenite (SiO2 based)
sedimentary
Sandstone (likely Arkosic)
Arenite (SiO2 based)
sedimentary
Blue Dyed Quartzite
Silicon Dioxide (SiO2) with artificial pigment
metamorphic
Sandstone River Cobble
Arenite (SiO2 based)
sedimentary
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Water-worn Cobble)
Arenite (SiO2 based)
sedimentary
Sandstone (Stream-rounded)
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Quartz-rich)
Arenite (SiO2 based)
sedimentary
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Lepidolite
K(Li,Al)3(Si,Al)4O10(F,OH)2
Mineral
Sandstone (with Possible Iron Staining/Crust)
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Concrete Fragment
Artificial Conglomerate (Cement and Aggregate)
sedimentary
Sea Glass (Frosted Glass Fragment)
Amorphous Silica (Anthropogenic Sediment)
sedimentary
Leland Blue Stone
Anthropogenic Iron Smelting Slag
mineraloid
Native gold (small nugget or grain)
Native gold, Au
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone with Tafoni Weathering
Arenite (SiO2 based)
sedimentary
Sandstone (River Pebble)
Arenite (SiO2 based)
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 based)
sedimentary
Chalcopyrite
Copper iron sulfide (CuFeS2)
mineral
Slag
Anthropogenic Vitreous Silica/Iron oxides
mineral-like byproduct
Iron Slag
Anthropogenic Vitreous Silicate (Byproduct of Smelting)
Mineral-like byproduct
Asphalt (Bituminous Concrete)
Asphaltum / Bitumen-Aggregate Matrix
Technonatural composite (often containing sedimentary/igneous aggregate)
River Stone (likely Quartzite or Limestone)
Silicon dioxide (SiO2) or Calcium carbonate (CaCO3)
metamorphic
Likely weathered metallic mineral or slag fragment
Uncertain; possibly limonite/goethite-coated iron mineral, or industrial iron slag
mineral
Polished banded calcite (often sold as “onyx marble” or Mexican onyx)
Banded calcite, CaCO₃ (sometimes aragonite); decorative “onyx marble” is not true quartz onyx
sedimentary
Gold bullion bars
Native gold (Au), likely cast or refined metal
mineral
Lava Rock with Fabric Impression
Scoria or Basalt with anthropogenic impressions
igneous
Iron Slag
Anthropogenic Vitreous Ferrous Silicate
industrial byproduct (anthropogenic)
Asphalt Chunk (with aggregate)
Bituminous concrete / Anthropogenic conglomerate
sedimentary (anthropogenic/man-made conglomerate)
Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
not a rock (man-made origin)
Iron Slag
Ferrous slag (primarily silicates and oxides of calcium, iron, and magnesium)
Anthropogenic (Man-made industrial byproduct)
Geode (Unopened)
Quartz/Chalcedony concretion
sedimentary
Generic Rock Fragment
Rock Fragment
sedimentary
Herkimer Diamond
Quartz (Silicon Dioxide - SiO2)
mineral
Slag
Anthropogenic Vitrophyre (Iron or Smelting Slag)
Mineral-like byproduct