Sandstone
Arenite (SiO2 primarily)
Category
Browse mineral like industrial smelting waste specimens identified by the Rock Identifier community.
Sandstone
Arenite (SiO2 primarily)
Corundum (Sapphire variant)
Aluminium oxide (Al2O3)
Smoky Quartz
Silicon Dioxide (SiO2)
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2)
Quartzite with inclusions
Metamorphic Rock (Mainly SiO2)
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Garnet and Quartz
Pyrope or Almandine (Red Garnets) and Quartz (Center Stone)
Garnet (likely Almandine)
Almandine (Fe3Al2(SiO4)3)
Frosted Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2
Bauxite
Bauxite (mainly Al(OH)3, AlO(OH))
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Milky Quartz Pebble with Inclusions
Crystalline Silicon Dioxide (SiO2)
Diamond (or Diamond Simulant)
Carbon (C)
Rough Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
Muscovite Schist
Metamorphic rock primarily composed of quartz and muscovite mica
Peridot (Olivine)
Magnesium Iron Silicate (Mg,Fe)2SiO4
Garnet Schist
Almandine Garnet Schist
Diamond
Diamond (C)
Schist
Mica Schist (Metamorphic Rock)
Green Druzy Quartz (Prasiolite)
Silicon Dioxide (SiO2) with inclusions (typically Chlorite or Actinolite)
Magnetite
Magnetite (Fe3O4)
Honey Calcite
Calcium Carbonate (CaCO3)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Basalt with Quartz/Calcite Veins
Aphanitic Mafic Igneous Rock (Hydrothermal Veined)
Garnet in Quartz Matrix
Almandine Garnet (Fe3Al2(SiO4)3) in Quartz (SiO2)
Desert Rose
Baryte or Gypsum (Selenite) with Sand Inclusions (BaSO4 or CaSO4·2H2O)
Schist
Mica Schist (Group of medium-grade metamorphic rocks)
Quartz Geode in Sedimentary Matrix
Silicon Dioxide (SiO2) within a limestone/dolostone host
Fluorite (Green Fluorite)
Calcium Fluoride (CaF2)
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities and natural radiation
Fulonite (Fulgurite-like)
Fulgurite (SiO2 fused silica/lechatelierite)
Granodiorite
Granodiorite (intermediate plutonic rock)
Quartz Calcite Vug in Limestone
Calcium Carbonate (CaCO3) with Silicon Dioxide (SiO2) inclusions
Diamond
Natural Diamond (Carbon, C)
Quartz Pebble
Silicon dioxide (SiO2)
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
Pegmatite (Granitic Pegmatite with Quartz, Feldspar, and Mica)
Granitic Pegmatite
Sandstone
Arenite (SiO2 principal component)
Obsidian (black volcanic glass)
Obsidian; primarily amorphous SiO₂-rich rhyolitic glass
Milky Quartz with Talc / Serpentine
Silicon Dioxide (SiO2) with Mg3Si4O10(OH)2
Quartz (Peach/Orange variety)
Silicon Dioxide (SiO2)