Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
sedimentary
Category
Not A Natural Rock (Man Made Composite)
Browse not a natural rock (man made composite) specimens identified by the Rock Identifier community.
Red Sandstone
Arenite (predominantly Quartz with Hematite cementation)
sedimentary
Shale (Ferruginous)
Laminated Mudrock (Siliciclastic Sedimentary Rock)
sedimentary
Sandstone (with minor quartz and possible clay components)
Clastic Sedimentary Rock (SiO2 dominated)
sedimentary
Titanium Coated Aura Quartz (Apple Aura Quartz)
Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating
Mineral (Man-modified)
Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Ferruginous Sandstone (with possible Epidote/Chlorite coloring)
Sandstone (SiO2 dominated with Fe2O3 staining)
sedimentary
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2 + Fe2O3)
mineral
Vesicular Basalt or Scoria
Basalt (extrusive volcanic rock)
igneous
Sandstone (Quartzose)
Arenite (composed mainly of SiO2)
sedimentary
Granite
Felsic Intrusive Igneous Rock
igneous
Smoky Quartz
Smoky Quartz (SiO2: Silicon Dioxide)
mineral
Sandstone (Quartzose Sandstone)
Clastic Terrigenous Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Granite
Granite (Phaneritic Igneous Rock)
igneous
Shale with Iron Oxide Staining
Fissile Mudstone (primarily clay minerals and quartz)
sedimentary
Shale
Fissile mudstone (Shale)
sedimentary
Iron-stained Quartzite
Metamorphic Quartz (SiO2) with limonite/hematite staining
metamorphic
Sandstone
Arenite (predominantly Quartz Sandstone)
sedimentary
Sandstone (likely Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Bauxite (Pisolitic Bauxite)
Bauxite (mixture of Hydrous Aluminum Oxides)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with fibrous inclusions (commonly Dumortierite)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Sandstone (likely Arkosic or Quartzose)
Arenite (SiO2 based with mineral inclusions)
sedimentary
Sandstone (Quartzose Sandstone)
Arenite (SiO2 principal component)
sedimentary
Shale
Lutaceous Sedimentary Rock
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Granite
Phaneritic plutonic rock (Felsic)
igneous
Decomposed Granite
Grano-diorite/Granite-residuum (SiO2 primary)
igneous
Granite
Granite (felsic intrusive igneous rock)
igneous
Sandstone (Ferruginous)
Arenite (with Hematite/Limonite cement)
sedimentary
Chert (Grey-Green Flint)
Microcrystalline silicon dioxide (SiO2)
sedimentary
Chalcedony (Agate/Quartz)
Silicon Dioxide (SiO2)
mineral
Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)
Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)
mineral
Sandstone
Arenite/Quartz Arenite
sedimentary
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Blue Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Amethyst (Tumbled)
Quartz (Silicon Dioxide, SiO2) with iron impurities
mineral