Sandstone
Arenite (primarily SiO2)
sedimentary
Category
Industrial Byproduct (Anthropogenic Rock Like Material)
Browse industrial byproduct (anthropogenic rock like material) specimens identified by the Rock Identifier community.
Learn about Industrial Byproduct (Anthropogenic Rock Like Material) in the encyclopedia
View all →
Olivine in Basalt (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) / Scoriaceous Basalt (Host Rock)
igneous
Chert / Chalcedony Nodules
Microcrystalline Quartz (SiO2)
sedimentary
Note: This is a Man-Made Object (Costume/Prop Patch)
Synthetic fiber and pigments (Cellulose/Plastic-based composite)
Non-geological
Pumice or Scoria
Vesicular volcanic rock
Igneous
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Unidentified dark pebble
Undetermined; possibly polished basalt, chert, or iron-rich stone
mineral
Quartzite
Quartzite (Primary mineral: Quartz, SiO2)
metamorphic
Painted Sandstone Cobble
Clastic Sedimentary Rock (Sandstone base)
sedimentary
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
sedimentary
Gold and Diamond
Native Gold (Au) and Diamond (C)
mineral
Sandstone (with potentially high Feldspar/Arkose content)
Clastic sedimentary rock (SiO2 dominated)
sedimentary
Banded sandstone pebble
Quartz-rich lithic sandstone; exact provenance and composition require testing
sedimentary
Sandstone
Sandstone (SiO2-dominated clastic rock)
sedimentary
Sandstone
Sedimentary Clastic Rock
sedimentary
Sandstone (with Moss)
Quartz Arenite / Sandstone
sedimentary
Peridot in Basalt
Olivine ((Mg, Fe)2SiO4) in Basalt
mineral
Quartz Druzy (Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Geode with Quartz Crystal Cavity
Silicon Dioxide (SiO2) in Calcareous/Siliceous Matrix
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Tiffany Stone
Fluoritized Opal Beryllium Tuff (composed of Fluorite; CaF2, Opalized SiO2, Bertrandite, Chalcedony, and Quartz)
metamorphic
Note: Item is not a geological specimen
Guitar Components (Steel, Nickel, Plastic, Wood)
Synthetic/Consumer Product
Rock Fragment with Calcite/Quartz Vein
Polymictic Rock Fragment (SiO2 / CaCO3)
igneous
Peridot (Olivine)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Man-made Metal Pin (Non-geological)
Antimony-Lead Alloy or Zinc/Brass Base with Electroplating
Metal Alloy / Manufactured Artifact
Serpentinite (often called Jade or Nephrite substitute)
Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)
metamorphic
Shale
Shale (clastic sedimentary rock)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
sedimentary
Sandstone (Pebble)
Sandstone (SiO2 with iron oxide impurities)
sedimentary
Siltstone
Siltstone (primarily composed of microcrystalline Quartz and Feldspar)
sedimentary
Garnet Schist
Garnetiferous Micaceous Schist
metamorphic
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Likely dark green-gray metamorphic pebble
Indeterminate; possibly chlorite schist, serpentinite, or amphibolite
metamorphic
Black Tourmaline (Schorl)
Sodium Iron Aluminum Borate Silicate (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral/gemstone
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Brecciated jasper, possibly rainforest jasper or brecciated rhyolite
Brecciated microcrystalline quartz (SiO₂), commonly called jasper; the green portions may contain epidote, chlorite, or iron-bearing silicates, while red-brown areas are typically hematite or other iron oxides
sedimentary
Ruby (Raw Corundum)
Corundum (Al2O3 with Chromium impurities)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Diamond
Natural Diamond (Carbon, C)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone with Iron Staining
Arenite (SiO2 with Fe-oxide impurities)
sedimentary