Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Category
Industrial By Product
Browse industrial by product specimens identified by the Rock Identifier community.
Diamond (in a gold ring)
Diamond (pure carbon, C)
mineral
Mica Schist
Mica Schist (Predominantly Muscovite/Biotite)
metamorphic
Quartz with Mica inclusions (likely Schist or Gneiss host)
Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)
metamorphic
Quartz vein in metamorphic rock
Crystalline Silicon Dioxide (SiO2) in Host Rock
metamorphic
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
sedimentary
Bull Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Gold Nugget
Native Gold (Au)
mineral
Marble (Carrara Marble style)
Recrystallized Calcite (CaCO3)
metamorphic
Peridot
Olivine (Mg, Fe)2SiO4
mineral
Sandstone (Water-worn Cobble)
Arenite (SiO2 based)
sedimentary
Diamond
Diamond (C)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Kimberlite with Diamond
Kimberlite (Diamond formula: C)
igneous
Garnet (Almandine)
Almandine, Fe3Al2(SiO4)3
metamorphic
Agate
Cryptocrystalline Quartz (SiO2)
mineral
Limestone
CaCO3 (principally Calcite)
sedimentary
Serpentinite
Serpentinite (composed primarily of serpentine group minerals like lizardite, antigorite, and chrysotile)
metamorphic
Limonitic Quartzite
Metamorphosed sandstone with Limonite (FeO(OH)·nH2O) staining
metamorphic
Garnet
Garnet Group (Silicate Minerals), formula varies e.g., Almandine Fe3Al2(SiO4)3
mineral
Agate
Agate (Silicon Dioxide, SiO2)
mineral
Note: Item is not a geological specimen
Homo sapiens (Dermal Appendage: Pilus)
Organic / Biological
South Korean 100 Won Coin (Cupronickel)
Cupronickel Alloy (75% Cu, 25% Ni)
mineral-based alloy (anthropogenic)
Chert (and Jasper/Chalcedony mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Dyed Agate Slice
Silicon Dioxide (SiO2) with artificial colorants
Mineral (variety of Chalcedony)
Blue Glass or Slag Glass
Amorphous Silica (Anthropogenic Glass)
mineral
Green Slag Glass
Amorphous Silica / Glassy Blast Furnace Slag
Mineraloid (Industrial byproduct)
Ironstone (possibly Bog Iron or Limonite)
Goethite-rich Ironstone (FeO(OH))
sedimentary
Anthracite Coal
Anthracite (Carbon-based metamorphic rock)
metamorphic
Opalite (Man-made Glass)
Synthetic Opalised Glass
mineral
Ironstone (Limonitic Concretion)
Limonite (FeO(OH)·nH2O) with Goethite and Hematite inclusions
sedimentary
Ferrosilicon Slag (Industrial Vitrified Glass)
Vitreous Silicate Residue
Antropogenic (Man-made industrial byproduct)
Diamond in Kimberlite
Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)
igneous
Polymer Clay (Mock Mineral)
Polyvinyl chloride (PVC) with plasticizers and pigment
Synthetic material (Not a natural rock/mineral)
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral (man-enhanced)
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
man-made composite (lithified equivalent of sedimentary)
Quartzite
Quartzite (SiO2)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Basalt
Basalt (Aphanitic Mafic Volcanic Rock)
igneous
Basalt (Vesicular)
Basalt
igneous