Bituminous Coal
Bituminous coal (Carbonaceous sedimentary rock)
Category
Browse man made object (metal alloy) specimens identified by the Rock Identifier community.
Bituminous Coal
Bituminous coal (Carbonaceous sedimentary rock)
Moss Agate
Silicon Dioxide (SiO2) with Chlorite/Oxide inclusions
Iron-Nickel Meteorite fragment
Siderite (meteoritic iron), composed primarily of Kamacite (α-(Fe,Ni)) and Taenite (γ-(Fe,Ni))
Rhodochrosite (Beads) and Citrine (Pendant)
Rhodochrosite (MnCO3) and Quartz variety Citrine (SiO2)
Gold-bearing Quartz (Auriferous Quartz)
Quartz (SiO2) with native Gold (Au) inclusions
Hematite
Iron(III) oxide (Fe2O3)
Basalt pebble
Basalt (Mafic volcanic rock)
Pyrite
Iron Disulfide (FeS2)
Earthy Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
Bituminous Coal
Organic Sedimentary Rock (Carbon-based)
Hematite
Iron(III) oxide (Fe2O3)
Diamond (in a gold setting)
Carbon (C)
Pyrite
Iron Sulfide (FeS2)
Basalt
Mafic extrusive igneous rock
Pyrite
Iron Sulfide (FeS2)
Pyrite
Iron Disulfide (FeS2)
Basalt
Extrusive mafic igneous rock
Pyrite (Fool's Gold) in Matrix
Iron Sulfide (FeS2)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Fluorite
Calcium Fluoride (CaF2)
Green Fluorite
Calcium Fluoride (CaF2)
Iron Slag
Ferrous Slag (Industrial Byproduct)
Fluorite with Quartz
Fluorite (CaF2) and Quartz (SiO2)
Hematite (Iron Ore)
Hematite (Fe2O3)
Hematite
Hematite (Fe2O3)
Fluorite (specifically Blue John or Banded Fluorite)
Calcium Fluoride (CaF2)
Jasper
Silicon Dioxide (SiO2)
Bornite
Bornite (Cu5FeS4)
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
Fluorite
Calcium Fluoride (CaF2)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Ironstone Nodules / Siderite Concretion
Siderite (FeCO3) / Ferruginous Septarian Concretion
Specular Hematite with Quartz
Ferric oxide (Fe2O3) and Silicon dioxide (SiO2)
Vesicular Basalt
Extrusive Mafic Igneous Rock (Vesicular Basalt)
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
Pyrite
Iron Sulfide (FeS2)
Diabase (Greenstone)
Diabase or Dolerite
Rainbow Quartz (Dyed/Coated Quartz)
Silicon Dioxide (SiO2) with artificial color enhancement
Gold and Diamond
Native Gold (Au) and Diamond (C)
Amazonite
KAlSi3O8 (Potassium Feldspar, variety of Microcline)
Beryl (likely Aquamarine or Heliodor variant)
Beryllium aluminum cyclosilicate (Be3Al2Si6O18)
Fluorite on Matrix
Calcium Fluoride (CaF2)