Metal-rich sulfide ore, likely galena-bearing rock
Galena (PbS) with pyrite/chalcopyrite in a host rock; exact identification requires testing
mineral
Category
Mineral (Processed Metal)
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
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Gold Nugget
Gold (Au)
mineral
Faceted diamond gemstone (likely)
Diamond — crystalline carbon, C
gemstone
Tumbled Hematite with Quartz/Chert (Specular Hematite)
Fe2O3 (Iron Oxide)
mineral
Granite
Intrusive Igneous Rock
igneous
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Sea Glass (Turquoise/Aqua)
Amorphous Silica (SiO2) with transition metal dopants
Anthropogenic (Man-made material processed by nature)
Gold Nugget
Native Gold (Au)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Green Glass Slag
Amorphous Silicon Dioxide (SiO2) with metal oxide impurities
mineraloid (man-made)
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Silver (Native Element)
Ag (Argentum) - 90% Silver, 10% Copper alloy in specimen
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Limonite (Ironstone)
Limonite (FeO(OH)·nH2O)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Tumbled carnelian agate
Microcrystalline quartz (chalcedony), SiO₂; iron-oxide colored
mineral
Tumbled aqua glassy mineral specimen, likely chrysocolla or turquoise imitation
Uncertain from image; possible chrysocolla (hydrated copper aluminosilicate, variable composition) or dyed/man-made glass
mineral
Tumbled carnelian (likely chalcedony)
Carnelian, orange-red cryptocrystalline quartz (SiO₂), a variety of chalcedony
gemstone
Slag (Industrial Byproduct)
Ferrous/Non-ferrous Silicate
igneous (artificial/anthropogenic)
Concrete
Anthropogenic Sedimentary Conglomerate (Cement mixture: typically Ca2SiO4, Ca3SiO5, Ca3Al2O6)
sedimentary (artificial)
Quartzite
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Sulfide Ore (likely Galena and Sphalerite in Quartz)
Lead-Zinc Ore (PbS and ZnS)
mineral
Milky Quartz with inclusions
Silicon Dioxide (SiO2)
mineral
Jasper with Iron Staining
Silicon Dioxide (SiO2) with impurities
sedimentary
Tumbled blue-green stone, likely chrysoprase or dyed chalcedony
Cryptocrystalline quartz (SiO₂), possibly nickel-bearing chrysoprase; exact identification requires testing
gemstone
Granite
Felsic intrusive igneous rock
igneous
Likely industrial slag or weathered basalt
Basaltic rock; possibly iron-rich furnace slag (diagnosis uncertain from image)
igneous
Faceted Quartz (Rock Crystal)
Crystalline Silicon Dioxide (SiO2)
gemstone
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Granite (with Beryl/Aquamarine)
Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)
igneous
Gold-Bearing Quartz
Silicon Dioxide with Native Gold (SiO2 + Au)
mineral
Basalt with Quartz Vein
Basalt (fine-grained mafic igneous rock) with crystalline Quartz (SiO2)
igneous
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Metasedimentary or Igneous matrix
mineral
Quartz Vein in Pelite (Metamorphic Rock)
Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)
metamorphic
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Bauxite
Bauxite (Al2O3·2H2O mixed with iron oxides)
sedimentary
Granite
Intrusive igneous rock composed mainly of quartz, alkali feldspar, and plagioclase
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
mineral
Star sapphire ring
Corundum (Al₂O₃), likely asteriated sapphire
gemstone
Blue Impression Jasper beads
Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions
gemstone
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral