Milky Quartz
Silicon Dioxide (SiO2)
Category
Browse mineral like byproduct (technogenic) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
Vesicular Basalt (or Porphyritic Scoria)
Vesicular Basalt
Banded Gneiss
Gneiss (pronounced 'nice')
Amygdaloidal Basalt
Amygdaloidal Basalt (Ca-rich Plagioclase, Pyroxene, and Olivine)
Gneiss
Gneiss
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Ironstone Concretion
Siderite or Hematite Concretion
Petrified Wood
Silicified Wood (primarily Quartz/SiO2)
Schist
Chlorite-Mica Schist
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
Rough Garnet (likely Almandine or Pyrope)
Garnet group; Almandine Fe3Al2(SiO4)3 or Pyrope Mg3Al2(SiO4)3
Granite
Granite (Phaneritic intrusive igneous rock)
Petrified Wood
Silicified Wood (SiO2)
Olivine Basalt (with Epidote and Serpentine)
Mafic Volcanic Rock (Basalt)
Ferruginous Sandstone (Gritstone)
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3 and FeO(OH))
Watermelon Tourmaline in Quartz Matrix
Elbaite (complex Borosilicate) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
Turquoise
Turquoise - CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
Iron-stained Quartz
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
Bauxite
Aluminium ore (Hydrated aluminium oxides AlOx(OH)3-2x)
Quartz Geode
Silicon Dioxide (SiO2)
Limonite with Iron Inclusions
Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O)
Fluorite (Polished Point/Tower)
Calcium Fluoride (CaF2)
Yellow Quartz
Silicon Dioxide (SiO2)
Mookaite Jasper
Silicified Radiolarite (SiO2)
Green Fluorite
Calcium Fluoride (CaF2)
Chalcedony (Botryoidal Agate vein)
Chalcedony (Microcrystalline Quartz) - SiO2
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Sandstone
Quartzose Sandstone / Lithic Sandstone
Sandstone (Red/Brown Sandstone pebble)
Arenite (SiO2 dominated sandstone)
Clear Quartz (Tumbled)
Silicon Dioxide (SiO2)
Gneiss
Gneiss (High-grade metamorphic rock)
Mica-rich Schist fragment
Mica Schist
Sandstone
Arenite
Ruby
Corundum (Al2O3)
Slate
Slate (Foliated Metamorphic Rock)
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
Gneiss
Gneiss (High-grade metamorphic rock)
Granite
Phaneritic Felsic Intrusive Igneous Rock
Basalt with Weathering Crust
Extrusive mafic volcanic rock
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)