Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Category
Industrial Byproduct (Often Mistaken For Obsidian Or Mineral)
Browse industrial byproduct (often mistaken for obsidian or mineral) specimens identified by the Rock Identifier community.
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Rough Diamond
Diamond (Native Carbon, C)
mineral
Blue Sapphire
Corundum (Al2O3) with traces of Iron and Titanium
mineral
Obsidian (Apache Tear)
Obsidian (Amorphous Volcanic Glass / SiO2 with impurities)
igneous
Sandstone (Quartz Arenite)
Clastic Sedimentary Rock - Quartz Arenite
sedimentary
Ruby (Corundum)
Aluminum Oxide (Al2O3) with Chromium traces
mineral
Silver (Native Element / Alloy)
Silver (Ag)
mineral
Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Tektite (specifically Indochinite)
Tektite (Natural silica glass)
Mineraloid (Impact glass)
Tourmaline (Multi-colored)
Complex Borosilicate (Na,Ca)(Li,Mg,Al,Fe)3Al6(BO3)3Si6O18(OH)4
mineral
White Topaz
Al2SiO4(F,OH)2 (Aluminium Silicate Fluoride Hydroxide)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2) with Limonite/Goethite
mineral
Bog Iron (Limonite)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
sedimentary
Quartz vein in Host Rock
Crystalline Silicon Dioxide (SiO2) in Lithic Matrix
metamorphic
Chalcanthite (Likely Synthetic/Lab-Grown)
Hydrated copper(II) sulfate (CuSO4·5H2O)
mineral
Pyrite
Pyrite (Iron Disulfide), FeS2
Mineral
Quartz (Iron-stained or Rose variant)
Silicon Dioxide (SiO2)
mineral
White Topaz
Aluminum Silicate Fluoride Hydroxide, Al2SiO4(F,OH)2
mineral
Rose Quartz Beads
SiO2 (Silicon Dioxide with trace inclusions of Ti, Fe, or Mn)
mineral
Diamond (Cut Gemstones in Jewelry)
Carbon (C)
gemstone
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Garnet Schist
Almandine-Mica Schist
metamorphic
Fluorite (Rainbow Fluorite Tower)
Fluorite (Calcium Fluoride, CaF2)
mineral
Calcite Geode
Calcium Carbonate (CaCO3)
mineral
Yellow Quartz / Quartzite Pebble
Silicon Dioxide (SiO2)
mineral
Quartz with Mica (Micaceous Quartz)
Silicon Dioxide (SiO2) with Phyllosilicates
igneous/metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Red Sandstone (Old Red Sandstone Pebble)
Arenite with iron oxide (Fe2O3) cement
sedimentary
Sandstone (Red Sandstone)
Arenite
sedimentary
Basalt
Aphanitic Mafic Igneous Rock
igneous
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Mica Schist
Schist (muscovite-biotite schist)
metamorphic
Smoky Quartz
Smoky Quartz (SiO2 - Silicon Dioxide with trace impurities of aluminum)
mineral
Bixbyite on Rhyolite
Bixbyite (Mn2+,Fe3+)2O3
mineral
Quartzite
Quartzite (High-purity SiO2)
metamorphic
Sandstone (Water-worn Cobble)
Arenite (SiO2 based)
sedimentary
Quartz (Translucent/Rose variety)
Silicon Dioxide (SiO2)
mineral
Tektite (Indochinite)
Tektite (Natural Glass, SiO2 + Al2O3)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral