Sandstone (Quartz-rich)
Arenite (SiO2 based)
sedimentary
Category
Not A Natural Rock (Man Made Composite)
Browse not a natural rock (man made composite) specimens identified by the Rock Identifier community.
Sandstone (Quartzose Sandstone)
Arenite
sedimentary
Sandstone
Arenite (SiO2 with various cementing agents)
sedimentary
Dyed Agate
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Arenite (Siliclastic Sedimentary Rock)
sedimentary
Granite (Background) and Quartzite/River Pebble (Foreground Heart)
Phaneritic Felsic Igneous Rock (Granite background)
igneous
Pink Granite
Phaneritic Felsic Igneous Plutonic Rock
igneous
Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Sandstone (Quartzose)
Arenite (SiO2 principal)
sedimentary
Asphalt (Bituminous Slate/Sandstone)
Asphaltum / Bituminous Rock
sedimentary
Sandstone (Ferruginous)
Sandstone (SiO2 with iron oxide inclusions)
sedimentary
Amethyst (Variety of Quartz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Coquina
Coquina (Bioclastic Limestone)
sedimentary
Amethyst
Amethyst (SiO2 with Iron impurities)
mineral
River Stone (likely Siltstone or fine-grained Sandstone)
Clastic Sedimentary Rock (Lithic Wacke / Siltstone)
sedimentary
Sandstone Pebble
Arenite (primarily SiO2)
sedimentary
United States Quarter Dollar
Cupronickel Clad Alloy (75% Copper, 25% Nickel over a 100% Copper core)
Metal / Man-made mineral-like object
Nephrite Jade
Nephrite
Mineral/Rock
Sandstone (likely Ferruginous)
Arenite (SiO2 based with Fe2O3/FeO(OH) cement)
sedimentary
Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate)
Mixed Silicates and Oxides (predominantly SiO2 group minerals)
mineral
Granite
Granite (phaneritic felsic intrusive rock)
igneous
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz, SiO2)
sedimentary
Granite
Granite (Felsic Plutonic Rock)
Igneous
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
sedimentary
Emerald in Matrix
Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium
mineral
Sandstone
Clastic sedimentary rock (primarily Quartz and Feldspar)
sedimentary
Sandstone
Arenite (SiO2-rich)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
Blue Lace Agate
Cryptocrystalline Quartz (SiO2) with trace minerals
sedimentary
Picture Jasper
Silicon Dioxide (SiO2)
sedimentary
Granite
Granite (Phaneritic Acid Igneous Rock)
igneous
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide staining/cementing)
sedimentary
Sandstone (Quartzose type)
Arenite (primarily SiO2)
sedimentary
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Chert (Holey Stone)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 oxides)
sedimentary
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
mineral