Serpentinite
Serpentinite (complex silicate minerals including Mg3Si2O5(OH)4)
metamorphic
Category
Igneous Rock
Browse igneous rock specimens identified by the Rock Identifier community.
Ferruginous Sandstone
Arenite with Iron-oxide cement
sedimentary
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Unakite
Epidotized Granite
metamorphic
Man-made Jewelry (Metal and Glass/Plastic)
Synthetic Alloy and Amorphous Solid (SiO2/Polymer)
not a rock
Digital Multimeter (Synthetic Object)
Digital Multimeter (DMM)
not a rock
Wood Paneling
Engineered Wood / Plywood Paneling
not a rock
Note on Image Identification: Textile
N/A (Anthropogenic material)
not a rock
Unakite
Epidotized Granite
metamorphic
Quartzite Cobble
Quartzite (primarily SiO2)
metamorphic
Lapis Lazuli (Tumbled)
Lazurite-dominated contact metamorphic rock
metamorphic
Unakite (Epidote-Rich Granite)
Unakite (Granite consisting of Orthoclase, Quartz, and Epidote)
metamorphic
Bauxite
Bauxite (Mixture of Hydrous Aluminum Oxides)
sedimentary
Schist (Garnet-Mica Schist)
Garnet-Mica Schist
metamorphic
Synthetic Wolf Plush (Non-mineral)
Canis lupus similis (Prop material: Polyester & Synthetic fibers)
Synthetic material/Textile
Lake Superior Agate
Cryptocrystalline Quartz (SiO2)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Unakite
Epidotized Granite
metamorphic
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Weathered Volcanic Rock (possibly Rhyolite or Andesite Pebble)
Volcanic rock (e.g., Rhyolite or Andesite, specific identification would require thin section analysis or chemical assay). Mineral composition: Primarily feldspars (orthoclase and/or plagioclase), quartz (in rhyolite), micas, amphiboles, and sometimes pyroxenes.
Igneous, specifically volcanic/extrusive (possibly Rhyolite or Andesite)
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Eclogite garnet in matrix
Eclogite (Garnet-Omphacite rock)
metamorphic
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Calligraphy Stone
Mariam Jasper (Fossiliferous Limestone with Hematite and Iron)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone (Picture Sandstone)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Yellow Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
River Pebble (Likely Quartzite or Chert)
Quartzite (primarily SiO2)
metamorphic
Banded Agate (specifically Botswana Agate or Water-line Agate)
Chalcedony (cryptocrystalline variety of Quartz), SiO2
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
metamorphic
Red Jasper with Quartz Veining
Jasper (Silicon Dioxide, SiO2) with Quartz (SiO2) inclusions
sedimentary
Jasper (Iron-stained Quartzite/Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Yellow Quartzite (River Pebble)
Quartzite (primarily SiO2 with iron oxide inclusions)
metamorphic
Sandstone
Arenite (often composed of Quartz, SiO2)
sedimentary
Moss Agate
Chalcedony (Silicon Dioxide / SiO2)
mineral
Jasper (brecciated or orbicular variety)
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary/mineral