Native Copper (in coinage alloy)
Copper (Cu)
mineral
Category
Industrial Byproduct (Anthropogenic Rock)
Browse industrial byproduct (anthropogenic rock) specimens identified by the Rock Identifier community.
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Pyrope Garnet
Magnesium aluminum silicate (Mg3Al2Si3O12)
mineral
Olivine
Magnesium Iron Silicate ((Mg, Fe)₂SiO₄)
mineral
Ruby and Diamond Heart Pendant
Corundum (Al2O3) and Diamond (C)
mineral
Iolite (Cordierite)
Cordierite (Magnesium iron aluminum cyclosilicate), Mg2Al4Si5O18
metamorphic
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Diamond (in jewelry mount)
Carbon (C)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Olivine (Peridot)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
mineral
Quartz pebble
Silicon Dioxide (SiO2)
mineral
Gold-Bearing Quartz Ore
Crystalline Silicon Dioxide (SiO2) with Trace Aurum (Au)
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Granite
Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)
igneous
Green glassy slag or manufactured glass bead
Noncrystalline silicate glass; likely industrial glass/slag, not a true mineral
mineral
Druzy Quartz on Limestone
Silicon Dioxide (SiO2) on Calcium Carbonate (CaCO3)
sedimentary
Xenolith in Basalt
Mafic Igneous Rock with Felsic Inclusion
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Basalt with Xenolith
Extrusive Igneous Rock containing Mantle Xenolith
igneous
Chert (Jasper/Flint Pebble)
Microcrystalline quartz (SiO2)
sedimentary
Chromium (Chrome)
Chromium (Cr)
mineral
Granite-like igneous rock
Likely medium-grained granite or granodiorite; quartz–feldspar–mica aggregate
igneous
Diamond
Diamond (pure Carbon, C)
mineral
Quartz pebble with calcite
Silicon dioxide (SiO2) with Calcium carbonate (CaCO3)
sedimentary
Quartzite Pebble with Feldspar Vein
Quartzite (SiO2) with Feldspar (KAlSi3O8)
metamorphic
Beach Pebble (Basalt/Porphyry)
Weathered Basalt or Porphyry
igneous
Schist (likely Mica Schist)
Mica Schist
metamorphic
Yellow Jasper with Hematite
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Rock Specimen
Unclassified rock specimen
sedimentary
Shale
Shale (Lutite)
sedimentary
Vesicular Basalt (Pumice-like)
Vesicular Basalt
igneous
Granodiorite
Granodiorite (containing Plagioclase, Quartz, and Biotite)
igneous
Serpentine
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Vesicular Basalt (or Scoria)
Extrusive Igneous Rock (Mafic)
igneous
Rough Diamond
Diamond (pure carbon / C)
mineral
Diamond
Carbon (C)
Mineral
Basalt Pebble / River Stone
Basalt (Mafic Extrusive Igneous Rock)
igneous
Likely basalt or vesicular volcanic rock
Basalt, possibly scoriaceous basalt; exact identification is uncertain from the photograph
igneous
Diamond
Diamond (pure Carbon, C)
mineral
Basalt
Extrusive Igneous Rock
igneous
Wishing Rock (Quartz Vein in Host Rock)
Silicon dioxide (SiO2) vein in various host rocks
Igneous/Sedimentary/Metamorphic with Mineral Vein