Green Calcite
Calcium Carbonate (CaCO3)
mineral
Category
Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)
Browse industrial byproduct (often confused with igneous rocks or meteorites) specimens identified by the Rock Identifier community.
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Epidote
Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)
mineral
Lazulite
Lazulite (Mg,Fe2+)Al2(PO4)2(OH)2
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Andesite
Andesite (Intermediate Extrusive Volcanic Rock)
igneous
Agate
Banded Chalcedony (SiO2 - Silicon Dioxide)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Corundum (Sapphire/Ruby in Matrix)
Aluminium oxide (Al2O3)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Rhodonite Tumbled Chips
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities and natural radiation
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Yellow Aventurine
Silicon Dioxide (SiO2) with inclusion of Mica
Mineral (Variety of Quartz)
Blue Sapphire
Corundum (Al2O3 - Aluminum Oxide with Iron and Titanium impurities)
mineral
Chalcedony (Smoky Quartz or Agate nodule fragment)
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Quartz (SiO2) - specifically, a variety of macrocrystalline quartz
Mineral
Tufa (Vesicular Limestone)
Tufa (form of Calcium Carbonate, CaCO3)
sedimentary
Sapphire (Corundum variety)
Sapphire (Al₂O₃)
Mineral
Chrysocolla in Jasper (Chryso-Jasper)
Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O (Chrysocolla) + SiO2 (Jasper)
mineral
Tourmaline (likely Schorl)
Tourmaline Group Mineral (e.g., Schorl for black varieties); (Na,Ca)(Li,Mg,Fe,Mn,Al)3Al6(BO3)3Si6O18(OH)4
Mineral
Rough Garnet (likely Almandine or Pyrope)
Garnet group; Almandine Fe3Al2(SiO4)3 or Pyrope Mg3Al2(SiO4)3
mineral
Garnet Beads
Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)
Mineral
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Quartz (Water-worn pebble)
Silicon Dioxide (SiO2)
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Black Sapphire
Corundum (Al2O3 with inclusions of hematite or ilmenite)
mineral
Pegmatitic Granite
Granite with Orthoclase Feldspar and Quartz (SiO2, KAlSi3O8)
igneous
Fuchsite in Quartz
K(Al,Cr)2(AlSi3O10)(OH)2 in SiO2
metamorphic
Basalt
Basalt
Igneous
Fluorite (left), Sodalite (middle), Dumortierite/Tumbled Quartzite (right)
Calcium Fluoride (CaF2), Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2), Aluminum Borosilicate (Al7(BO3)(SiO4)3O3)
mineral
Kaolinite (Chalky Clay)
Kaolinite (Al2Si2O5(OH)4)
sedimentary
Quartz (in a rock matrix)
Quartz (SiO2)
mineral
Pegmatite with Smoky Quartz and Feldspar
Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8)
igneous
Chalcedony (Moonstone variant or White Agate)
Silicon Dioxide (SiO₂)
mineral
Pink Granite
Granite (Alkali-feldspar granite)
igneous
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Epidosite
Epidosite (predominantly Epidote {Ca2Al2Fe3+Si3O12(OH)} and Quartz {SiO2})
metamorphic
Fluorite
Calcium fluoride (CaF2)
mineral
Peridot in Basalt/Xenolith
Olivine (Mg, Fe)2SiO4 in Vesicular Basalt
igneous