Pet Rock (Man-made Quartzite or Granite Cobble)
Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica
Category
Browse igneous or metamorphic (base stone); anthropogenic (decoration) specimens identified by the Rock Identifier community.
Pet Rock (Man-made Quartzite or Granite Cobble)
Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica
Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)
Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)
Asphalt Concrete
Bituminous Concrete / Asphaltic Composite
Basalt Porphyry
Porphyritic Basalt
Mica Schist
Schist (Muscovite/Biotite Schist)
Andesite
Andesite (contains Plagioclase feldspar, Pyroxene, Hornblende)
Mystic Topaz
Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)
Greenstone Celt (Polished Stone Axe)
Metamorphosed mafic rock (often Basalt or Diabase)
Terrazzo (Synthetic Composite Rock)
Cementitious or Epoxy Resin-bound Aggregates
Vesicular Basalt (Amygdaloidal)
Vesicular Basalt (Fe-Mg rich extrusive volcanic rock)
Rhyolite Pebble
Rhyolite
Basalt
Basalt (Mafic volcanic rock)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Golden Mica Schist
Mica Schist (primarily Muscovite/Biotite with Quartz)
Basalt Pebble
Extrusive mafic igneous rock
Asphalt Concrete (Bituminous Conglomerate)
Anthropogenic Bituminous Conglomerate
Slag (Industrial)
N/A (Anthropogenic Slag)
Quartz with Mica Schist (Pegmatite Specimen)
SiO2 (Silicon Dioxide) and Phyllosilicates (Biotite/Muscovite)
Slag Glass
Anthropogenic Amorphous Silicon Dioxide
Smoky Quartz (Polished)
Silicon Dioxide (SiO2)
Greenstone
Protolith of basalt, diabase, or gabbro; often contains minerals like chlorite, actinolite, and epidote
Basalt
Basalt (Mafic volcanic rock)
Basalt (Vesicular)
Basalt (Mafic Extrusive Igneous Rock)
Basalt Pebble
Basalt (Mafic volcanic rock)
Sandstone (with potentially metamorphic or basaltic bands)
Arenite / Lithic Wacke
Ferrochrome Slag
Anthropogenic slag (Fe-Cr alloy waste)
Man-made Slag (Industrial Byproduct)
Anthropogenic Glassy Residue
Engineer Quartz/Quartzite
SiO2 (Silicon Dioxide with binders)
Bull Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Zoisite with Ruby
Anyolite (Calcium aluminum hydroxy silicate with Corundum) Ca2Al3(SiO4)3(OH)
Slag
Anthropogenic glassy silicate
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Quartz Pebble (with potential iron inclusions)
Silicon Dioxide (SiO2)
Ferruginous Quartz
Quartz (Silicon Dioxide) - SiO2 with Iron Oxide inclusions
Concrete / Anthropogenic Conglomerate
Man-made composite material (Portland cement, aggregate, and water)
Jasper and Basalt (Mixed Breccia or Chert)
Silicon Dioxide (SiO2) with Ferromagnesian silicates
Painted River Rock
Anthropogenic-modified Siliciclastic Sedimentary Rock
Citrine
Silicon dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Gneiss
Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)
Conglomerate (Asphaltic/Anthropogenic)
Clastic sedimentary rock / Bituminous mixture
Citrine
Citrine (Silicon Dioxide, SiO2)