Mica (likely Muscovite)
Muscovite / KAl2(AlSi3O10)(OH)2
mineral
Category
Mineral (Native Element)
Browse mineral (native element) specimens identified by the Rock Identifier community.
Green Aventurine
Aventurine (a variety of Quartz, SiO2 with fuchsite inclusions)
Mineral
N/A (Non-Geological Specimen)
N/A
Amazonite with Smoky Quartz and Feldspar
Microcline (KAlSi3O8) with Quartz (SiO2)
mineral
Basalt
Basalt
Igneous
River Cobble (likely Sandstone or Siltstone type)
Sandstone or Siltstone (common rock types that form river cobbles)
Sedimentary Rock (specifically a clastic sedimentary rock formed into a cobble)
Limonite after Pyrite (Prophecy Stone)
Limonite (FeO(OH)·nH2O) replacing Pyrite (FeS2)
Mineral pseudomorph
Eudialyte
Eudialyte (Na4(Ca,Ce)2(Fe2+,Mn,Y)ZrSi8O22(OH,Cl)2)
mineral
Amethyst (Tumbled Stone)
Amethyst (Silicon Dioxide with Iron impurities, SiO2)
mineral
Portable Ceramic Space Heater
Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements
not a rock (synthetic/industrial object)
Amethyst (Chevron Amethyst)
Silicon Dioxide (SiO2) with iron impurities
mineral
Pegmatite
Coarse-grained Igneous Rock (Granitic Pegmatite)
igneous
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Aquamarine (Rough)
Beryl (Be3Al2Si6O18)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
mineral
Tourmaline (Multi-colored)
Complex Borosilicate (Na,Ca)(Li,Mg,Al,Fe)3Al6(BO3)3Si6O18(OH)4
mineral
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Aquamarine (Pale variety)
Beryl (Be3Al2Si6O18)
mineral
Eudialyte
Eudialyte (Na4(Ca,Ce)2(Fe2+,Mn,Y)ZrSi8O22(OH,Cl)2)
mineral
Chevron Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Blue Sapphire (Synthetic or Man-made Glass Imitation)
Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic
mineral
Cubic Zirconia (CZ) Jewelry
Zirconium dioxide (ZrO2)
mineral (synthetic)
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Granite Pebble (River Rock)
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Sandstone (Red Sandstone)
Arenite (SiO2 based with Fe2O3 staining)
sedimentary
Cubic Zirconia
Zirconium dioxide (ZrO2)
mineral
Amethyst (Faceted)
Silicon Dioxide (SiO2) with iron impurities
mineral
Gold Ore
Auriferous Quartz and Sulfide Mineralization in Host Rock
igneous
Pearl
Calcium Carbonate (CaCO3) - mainly Aragonite and Calcite
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Rose Quartz (SiO2 with trace Ti, Fe, or Mn)
mineral
Stainless Steel (Polished)
Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)
Mineral equivalent / Metal Alloy
Amethyst
Silicon Dioxide (SiO2) with traces of Iron (Fe3+)
mineral
Amethyst
Amethyst (Silicon Dioxide SiO2 + Fe4+)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Granitic Pegmatite
Granitic Pegmatite (principally Quartz, Potassium Feldspar, and Mica)
igneous
Biotite / Black Mica
Biotite K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Amethyst Geode
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with iron impurities)
mineral
Parti Sapphire
Corundum (Al2O3)
mineral
Amethyst
Silicon dioxide / Violet Quartz (SiO2)
mineral