Industrial Diamond (Bort or Boart)
Diamond (pure Carbon, C)
mineral
Category
Mineral (Processed Metal)
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (Primary mineral: Quartz, SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Beryl (likely Emerald or Aquamarine in matrix)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Native Copper
Native Copper (Cu)
mineral
Granitic Pegmatite
Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8, Mica: KAl2(AlSi3O10)(OH)2)
Igneous
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxides
mineral
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Native Copper Nugget
Native Copper (Cu)
mineral
Gold Nugget / Flake
Native Gold (Au)
mineral
Gold Nugget
Native Gold (Au)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz / Calcite Vein Rock
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)
mineral
Pearl (Imitation or Cultured)
Calcium Carbonate (Aragonite/Calcite) - CaCO3
Mineraloid (Organic)
Quartzite (Water-Worn)
Quartzite (SiO2)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Gold Nugget
Native Gold (Au)
mineral
Bull Quartz (White Quartz)
Silicon Dioxide (SiO2)
mineral
Manganese Oxide Crust on Limestone
Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Quartz Veinated Sandstone or Siltstone
Silicon Dioxide (SiO2) within a clastic sedimentary matrix
sedimentary
Slag
Metallurgical by-product
Anthropogenic (Man-made material)
Milky Quartz
Quartz (Silica / Silicon Dioxide - SiO2)
mineral
Native Copper
Native Copper (Cu)
mineral
One Pound Coin (UK)
Nickel-Brass Alloy (Cu-Zn-Ni)
mineral
Gold
Native Gold (Au)
mineral
Green Glass Cullet / Recycled Glass
Amorphous Silicon Dioxide (SiO2) with various metal oxides
Man-made Glass (Not a natural rock or mineral)
Peridot
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
mineral
Iron Meteorite
Iron-Nickel Meteorite (primarily composed of kamacite and taenite alloys)
Mineral
Chert (Commonly known as Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartz vein in Host Rock
Crystalline Silicon Dioxide (SiO2) in Lithic Matrix
metamorphic
Malaysian 50 Sen Coin
Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)
Man-made object (coin)
Native Copper
Native Copper (Cu)
mineral
Turquoise color-bead and Hematite necklace
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
mineral