Pet Rock (Man-made Quartzite or Granite Cobble)
Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica
igneous or metamorphic (base stone); anthropogenic (decoration)
Category
Igneous Or Metamorphic (Base Stone); Anthropogenic (Decoration)
Browse igneous or metamorphic (base stone); anthropogenic (decoration) specimens identified by the Rock Identifier community.
Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)
Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)
sedimentary
Asphalt Concrete
Bituminous Concrete / Asphaltic Composite
not a natural rock (man-made composite)
Basalt Porphyry
Porphyritic Basalt
igneous
Mica Schist
Schist (Muscovite/Biotite Schist)
metamorphic
Andesite
Andesite (contains Plagioclase feldspar, Pyroxene, Hornblende)
igneous
Mystic Topaz
Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)
mineral
Greenstone Celt (Polished Stone Axe)
Metamorphosed mafic rock (often Basalt or Diabase)
metamorphic
Terrazzo (Synthetic Composite Rock)
Cementitious or Epoxy Resin-bound Aggregates
Man-made metamorphic-style composite
Vesicular Basalt (Amygdaloidal)
Vesicular Basalt (Fe-Mg rich extrusive volcanic rock)
igneous
Rhyolite Pebble
Rhyolite
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Golden Mica Schist
Mica Schist (primarily Muscovite/Biotite with Quartz)
metamorphic
Basalt Pebble
Extrusive mafic igneous rock
igneous
Asphalt Concrete (Bituminous Conglomerate)
Anthropogenic Bituminous Conglomerate
sedimentary
Slag (Industrial)
N/A (Anthropogenic Slag)
industrial by-product
Quartz with Mica Schist (Pegmatite Specimen)
SiO2 (Silicon Dioxide) and Phyllosilicates (Biotite/Muscovite)
Igneous/Metamorphic Hybrid
Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Smoky Quartz (Polished)
Silicon Dioxide (SiO2)
mineral
Greenstone
Protolith of basalt, diabase, or gabbro; often contains minerals like chlorite, actinolite, and epidote
metamorphic
Basalt
Basalt (Mafic volcanic rock)
igneous
Basalt (Vesicular)
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt Pebble
Basalt (Mafic volcanic rock)
Igneous
Sandstone (with potentially metamorphic or basaltic bands)
Arenite / Lithic Wacke
sedimentary
Ferrochrome Slag
Anthropogenic slag (Fe-Cr alloy waste)
industrial byproduct
Man-made Slag (Industrial Byproduct)
Anthropogenic Glassy Residue
not a natural rock
Engineer Quartz/Quartzite
SiO2 (Silicon Dioxide with binders)
Sedimentary or metamorphic-derived
Bull Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Zoisite with Ruby
Anyolite (Calcium aluminum hydroxy silicate with Corundum) Ca2Al3(SiO4)3(OH)
metamorphic
Slag
Anthropogenic glassy silicate
Mineral-like byproduct
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble (with potential iron inclusions)
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz
Quartz (Silicon Dioxide) - SiO2 with Iron Oxide inclusions
mineral
Concrete / Anthropogenic Conglomerate
Man-made composite material (Portland cement, aggregate, and water)
not a natural rock
Jasper and Basalt (Mixed Breccia or Chert)
Silicon Dioxide (SiO2) with Ferromagnesian silicates
sedimentary and igneous (mixed)
Painted River Rock
Anthropogenic-modified Siliciclastic Sedimentary Rock
Sedimentary
Citrine
Silicon dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)
metamorphic
Conglomerate (Asphaltic/Anthropogenic)
Clastic sedimentary rock / Bituminous mixture
sedimentary
Citrine
Citrine (Silicon Dioxide, SiO2)
mineral