Sandstone (Red)
Arenite (Fe2O3 heavy)
sedimentary
Category
Mineral (Metal)
Browse mineral (metal) specimens identified by the Rock Identifier community.
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Tiger Iron
Tiger Iron (Composition: SiO2, Fe2O3, Fe3O4)
metamorphic
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Zinc Ore (Sphalerite in Matrix)
Sphalerite (Zn,Fe)S within a carbonate or silicate host rock
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Native gold nuggets (likely gold-bearing specimen)
Native gold, Au; possibly associated quartz or sulfide matrix
mineral
Blue Celestite
Celestine (Strontium Sulfate, SrSO4)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Beryl (Emerald Variety)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Quartz Veinated Sandstone or Siltstone
Silicon Dioxide (SiO2) within a clastic sedimentary matrix
sedimentary
Industrial Diamond (Bort or Boart)
Diamond (pure Carbon, C)
mineral
Quartz Vein in Host Rock
Quartz (SiO2) in metamorphic host rock (likely schist or phyllite)
metamorphic
Bull Quartz (White Quartz)
Silicon Dioxide (SiO2)
mineral
Diamond
Diamond (C)
mineral
Pyrite with Calcite
Iron Disulfide (FeS2) with Calcium Carbonate (CaCO3)
mineral
Gold
Native Gold (Au)
mineral
Beryl (Emerald Variety)
Beryllium Aluminum Silicate (Be3Al2(SiO3)6)
mineral
Quartz / Calcite Vein Rock
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)
mineral
Bauxite
Bauxite (Mixture of Hydrous Aluminum Oxides)
sedimentary
Gold
Native Gold (Au)
mineral
Quartzite (Milky Quartz pebble)
Silicon Dioxide (SiO2)
metamorphic
Turquoise cabochon jewelry
Turquoise, hydrated copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O
gemstone
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Red Sandstone (Iron-Rich)
Arenite (Fe2O3)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Silver (S925)
Native Silver (Ag)
mineral
Porphyritic basalt or weathered volcanic rock
Basalt, likely plagioclase–pyroxene rock with possible olivine; exact identification requires testing
igneous
Pyrite in Matrix with Copper Alterations
Iron Sulfide (FeS2) with secondary Copper carbonates/sulfides
mineral
Labradorite cabochon
Labradorite, a calcium-rich plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
Mineral in Metamorphic/Igneous Host
Slag
Anthropogenic glassy silicate
Mineral-like byproduct
Gneiss (High-grade Metamorphic Rock)
Gneiss (Metamorphic silicate rock)
metamorphic
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Gold Nugget
Native Gold (Au)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Gold Nugget
Native Gold (Au)
mineral
Slag Glass (Cullet Glass)
Amorphous Silica (Industrial byproduct)
mineral
Native copper-bearing sulfide specimen
Likely chalcopyrite (CuFeS₂), possibly with native copper and iron oxides
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral