Amethyst
Silicon Dioxide (SiO2) with iron impurities
Category
Browse mineral like industrial smelting waste specimens identified by the Rock Identifier community.
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Sandstone (Quartz-rich Cobble)
Arenite
Clear quartz crystal fragment
Quartz, silicon dioxide (SiO₂)
Serpentinite
Serpentinite (composed largely of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile: Mg3Si2O5(OH)4)
Agate (Chert/Chalcedony)
Silicon Dioxide (SiO2)
Quartz with Hematite
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Copper Ore (likely Chalcopyrite in Matrix)
Chalcopyrite (CuFeS2)
Agate
Silicon dioxide (SiO2) - variety Chalcedony
Yellow Agate (Chalcedony)
Silicon Dioxide (SiO2)
Granite
Granitoid (dominated by Quartz and Feldspar)
Raw Garnet (Hessonite / Spessartine)
Silicate mineral group (X3Y2(SiO4)3)
Quartz with Iron Oxide Staining
SiO2
Quartz (Gravel Pebble)
Silicon Dioxide (SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Red Sandstone
Ferruginous Sandstone (SiO2 with Fe2O3)
Sandstone
Arenite (SiO2 principal)
Red Garnet
Almandine Garnet (Fe3Al2(SiO4)3)
Bauxite
Bauxite (Al(OH)3, AlO(OH))
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
Banded Agate
Agate (Cryptocrystalline variety of Quartz, SiO2)
Polished ocean jasper (orbicular jasper), possibly brecciated jasper
Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide pigments and minor volcanic inclusions
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
Jasper (Milky/Cream Variety)
Silicon Dioxide (SiO2) - variety of Chalcedony
Orange Calcite (with White Calcite/Quartz matrix)
Calcium Carbonate (CaCO3)
Andesite Porphyry (Geological Drill Core)
Andesite Porphyry
Basalt with Secondary Mineralization (Likely Zeolites or Calcite)
Aphanitic mafic volcanic rock with secondary mineral inclusions (e.g., CaAl2Si3O10·3H2O for Scolecite)
Agate
Silicon Dioxide / Cryptocrystalline Quartz (SiO2)
Bauxite
Bauxite (Al2O3·nH2O)
Yellow Sapphire
Corundum (Al2O3)
Quartz Pebble
Silicon Dioxide (SiO2)
Diamond (in jewelry setting)
Diamond (C - Pure Carbon)
Schist
Mica Schist
Tourmaline (Multi-colored)
Complex Borosilicate (Na,Ca)(Li,Mg,Al,Fe)3Al6(BO3)3Si6O18(OH)4
Fossilized gastropod (snail)
Gastropoda indet.; likely a mineral-replaced or steinkern fossil
Garnet Gneiss
Gneiss containing almandine-pyrope garnet
Garnet Schist
Garnet-bearing Mica Schist
Diamond in Kimberlite
Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)
Dyed Blue Agate
Silicon Dioxide (SiO2)
Kimberlite with Diamonds
Kimberlite (ultramafic potassic igneous rock)
Quartz Geode
Silicon Dioxide (SiO2)