Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
Mineral
Category
Sedimentary Like (Industrial Composite)
Browse sedimentary like (industrial composite) specimens identified by the Rock Identifier community.
Learn about Sedimentary Like (Industrial Composite) in the encyclopedia
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Anthracite Coal
Anthracite (Carbon-rich metamorphic sedimentary rock)
sedimentary
Mica Schist
Muscovite/Biotite Schist
metamorphic
Crackle Quartz (Dyed)
SiO2 (Silicon Dioxide) - Treated
mineral
Garnet in Schist (Mica Schist with Garnet Inclusion)
Garnetiferous Mica Schist (X3Al2(SiO4)3)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Weathered iron-rich concretion or ironstone nodule
Goethite–hematite limonite concretion (FeO(OH), Fe₂O₃, and hydrated iron oxides)
sedimentary
Fancy Jasper (Ocean Jasper or River Jasper variant)
Silicon Dioxide with inclusions (SiO2)
sedimentary
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Sandstone
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary
Tumbled jasper or chalcedony pebble
Microcrystalline quartz (SiO₂), likely jasper/chalcedony with iron-oxide staining
mineral
Wishing Stone (Basalt or Mudstone with Quartz/Calcite Veins)
Hydrothermally veined Basalt (SiO2/CaCO3 intrusions)
igneous or sedimentary
Honey Calcite (Yellow Calcite)
Calcium Carbonate (CaCO3)
mineral
Gneiss
Gneiss
metamorphic
Granite
Granitoid (dominated by Quartz and Feldspar)
igneous
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Desert Rose (Baryte/Gypsum Rosette)
Baryte (BaSO4) or Gypsum (CaSO4·2H2O)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Mocha Stone (Dendritic Agate)
Silicon Dioxide (SiO2) with Manganese/Iron inclusions
sedimentary
Epidote
Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Tumbled howlite (probable)
Howlite, Ca₂B₅SiO₉(OH)₅
mineral
Sandstone
Sandstone (SiO2 dominated)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Red Garnet
Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
mineral
Iron meteorite fragment (probable)
Fe–Ni metallic meteorite, commonly octahedrite (kamacite–taenite)
meteorite
Amethyst on Matrix
Amethyst (Silicon Dioxide, SiO2) with impurities of iron and irradiation
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Iron-rich concretion (probable limonite/goethite concretion)
Hydrated iron oxides, chiefly limonite (FeO(OH)·nH₂O) and goethite (FeO(OH))
sedimentary
Epidote
Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)
mineral
Greenschist
Greenschist (chlorite-epidote schist)
metamorphic
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
Mineral
Quartz (Tumbled/Polished Pebble)
Silicon Dioxide (SiO2)
mineral
White Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon dioxide / Quartz (SiO2)
mineral
River Quartzite (River Pebble)
Metamorphic Quartzite (SiO2)
metamorphic
Diamond (or Cut Gemstone / Cubic Zirconia)
Carbon (C)
gemstone
Olivine in Basalt (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)
igneous
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Quartz / Quartzite
Silicon Dioxide (SiO2)
Mineral / Metamorphic
Basalt
Basalt (Mafic volcanic rock)
igneous
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral