Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Category
Man Made Object (Metal Alloy)
Browse man made object (metal alloy) specimens identified by the Rock Identifier community.
Learn about Man Made Object (Metal Alloy) in the encyclopedia
View all →
Basalt
Basalt (Mafic Volcanic Rock)
igneous
Hematite Mineral Ore
Iron(III) oxide (Fe2O3)
mineral
Rhodochrosite with Pyrite and Quartz
Manganese Carbonate (MnCO3)
mineral
Lepidolite
K(Li,Al)3(Al,Si,IV)4O10(F,OH)2
mineral
Lepidolite
K(Li,Al)3(Al,Si,3O10)(F,OH)2
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Manganese Oxide Crust on Limestone
Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3
sedimentary
Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Quartz vein in Schist
Crystalline Silicon Dioxide (SiO2) in Metamorphic Host
metamorphic
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Boji Stone (Pop Rocks or Moqui Marbles)
Iron-manganese oxide concretion (Goethite/Hematite/Jarosite)
sedimentary
Basalt
Basalt (composition of plagioclase, pyroxene, and olivine)
igneous
Basalt
Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Granite
Felsic intrusive igneous rock
igneous
Fluorite (Yellow and Multi-color)
Calcium Fluoride (CaF2)
mineral
Optical Calcite (Iceland Spar)
Calcium Carbonate (CaCO3)
mineral
Fluorite on Matrix
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite (likely Fluorite on Quartz/Matrix)
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium fluoride (CaF2)
mineral
Jasper
Silicon Dioxide (SiO2) - a variety of Chalcedony (Cryptocrystalline Quartz)
Mineral
Basalt (Beach Pebble)
Extrusive Mafic Igneous Rock
igneous
Peacock Ore
Bornite (Cu5FeS4)
mineral
Gold Nugget
Native Gold (Au)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Basalt Xenolith in Matrix
Basaltic Mafic Xenolith / Ultra-mafic Inclusion
igneous
Iron Slag (Industrial Byproduct)
Anthropogenic pyrometallurgical residue
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Pyrite in Matrix (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite-rich Gossan
Iron Sulfide (FeS2) in Ore Matrix
mineral
Pyritic Sandstone
Clastic Sedimentary Rock (Pyrite-bearing Sandstone)
sedimentary
Ironstone pebble
Ironstone (Ferruginous Sedimentary Rock)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Native Copper
Native Copper (Cu)
mineral
Yellow Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite (often referred to as Rainbow Fluorite)
Fluorite (Calcium Fluoride, CaF2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral