Greywacke (River Pebble)
Greywacke sandstone with quartz veining
Category
Browse mineral like industrial smelting waste specimens identified by the Rock Identifier community.
Greywacke (River Pebble)
Greywacke sandstone with quartz veining
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
Kyawthuite
Kyawthuite (Bi3+Sb5+O4)
Sandstone with Secondary Mineral Encrustation
Arenite with Silica/Calcite deposits (SiO2 or CaCO3)
Ruby
Corundum (Al2O3)
Smoky Quartz
Silicon Dioxide (SiO2)
Olivine (Peridot)
Olivine (Magnesium Iron Silicate, (Mg,Fe)2SiO4)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Desert Rose
Baryte or Gypsum (Selenite) with Sand Inclusions (BaSO4 or CaSO4·2H2O)
Red Vanadinite on Matrix
Vanadinite (Pb5(VO4)3Cl)
Quartzite
Quartzite (Primary mineral: SiO2)
Sandstone (Pebble)
Arenite (primarily SiO2)
Gneiss
Gneiss (High-grade regional metamorphic rock)
Ferruginous Quartz
Iron-stained Quartz (Silicon Dioxide + Fe2O3 / FeO(OH))
Rough Diamond
Diamond (pure Carbon, C)
Garnet
Garnet Group (formula varies, e.g., Almasndine: Fe3Al2(SiO4)3)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Garnet Schist
Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)
Quartz with Mica inclusion
Silicon Dioxide (SiO2) with Muscovite/Biotite inclusions
Quartz Druze on Matrix
Silicon Dioxide (SiO2)
Chiastolite (Andalusite)
Al2SiO5
Milky Quartz (Gold-bearing Prospecting Specimen)
Silicon Dioxide (SiO2)
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
Yellow Quartz (Citrine/Quartzite Pebble)
Silicon Dioxide (SiO2)
Satin Spar (often marketed as Selenite)
Gypsum (CaSO4·2H2O)
Greenschist
Greenschist (Chlorite-Epidote-Actinolite Schist)
Greenish Metamorphic Rock (likely containing epidote or chlorite)
Metamorphic rock, possibly epidosite or greenstone
Fluorite (Green Fluorite)
Calcium Fluoride (CaF2)
Smoky Quartz
Silicon Dioxide (SiO2)
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
Bauxite
Bauxite (principal ore of aluminum, primarily Al(OH)3)
Corundum (Ruby variety)
Aluminium oxide (Al2O3)
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Banded Agate (specifically Sardonyx or Red Agate)
Silicon Dioxide (SiO2)
Olivine (Peridot when gem-quality)
Olivine Group (Magnesium Iron Silicate, (Mg,Fe)2SiO4)
Blue Agate (Tumbled and Dyed)
Silicon Dioxide (SiO2) with likely organic dyes
Yellow Calcite
Calcium Carbonate (CaCO3)
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities and natural radiation
Quartz (Water-worn pebble)
Silicon Dioxide (SiO2)
Bauxite
Bauxite (Al2O3·2H2O)
Dyed Quartz (often sold as 'Blue Quartz' or 'Blue Agate')
Silicon Dioxide (SiO2) with artificial pigment