Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Category
Anthropogenic Specimen (Man Made Material)
Browse anthropogenic specimen (man made material) specimens identified by the Rock Identifier community.
Quartz (Rock Crystal) with minor impurities
Quartz (SiO2)
Mineral
Red Sandstone
Arenite (with Iron Oxide / Hematite staining)
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Obsidian
Volcanic glass
igneous
Sandstone (Quartzose)
Arenite (Formula: SiO2 primary, with various cements)
sedimentary
Chert (often called Flint or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (with Feldspathic/Arkose qualities)
Arenite (primarily SiO2 with KAlSi3O8 components)
sedimentary
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Nephrite Jade (River Bed Pebble)
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Arid Sandy Loam
Arenosols / Regosols
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Caliche (with Lichen Cover)
Calcium carbonate-cemented soil layer (CaCO3)
sedimentary
Granite
Phaneritic intrusive igneous rock (consisting mainly of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Sandstone (Quartz-rich Pebble)
Arenite (primarily SiO2)
sedimentary
Chert (specifically River Stone / Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Red Quartzite River Pebble
Quartzite (SiO2 with iron oxide inclusions)
metamorphic
Coquina (Fossiliferous Limestone)
Coquina (Organic Clastic Limestone)
sedimentary
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Pegmatite (Granitic)
Granitic Pegmatite containing Quartz, Feldspar, and Tourmaline (Schorl)
igneous
Quartzite with Iron Inclusions
Quartzite (largely SiO2) with Hematite/Limonite staining (Fe2O3)
metamorphic
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Porphyritic Basalt (Peanut Obsidian/Star Galaxy-style)
Porphyritic Basalt (Silica-rich Volcanic Rock)
igneous
Pearl
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
mineral
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Ferruginous Sandstone (Ironstone Nodules)
Ferruginous Sandstone with Limonite/Goethite coating (Fe2O3·H2O)
sedimentary
Quartz (Iron-stained)
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Quartzite (River Cobble)
Quartzite (SiO2)
metamorphic
Chert (variations include Chalcedony and Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (and Chert Geode)
Silicon Dioxide (SiO2)
sedimentary
Gold and Silver (Metal Components of an Antique Pocket Watch)
Native Gold (Au) and Native Silver (Ag)
mineral
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Synthetic Wolf Plush (Non-mineral)
Canis lupus similis (Prop material: Polyester & Synthetic fibers)
Synthetic material/Textile
Chert (specifically Jasper or Brown Chert node)
Microcrystalline Quartz (SiO2)
sedimentary
Shale or Siltstone
Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)
sedimentary
Chrysocolla
Hydrated copper silicates (Cu, Al)2H2Si2O5(OH)4·nH2O
mineral
Granite (with alteration)
Granite (Felsic intrusive igneous rock)
igneous
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary