Granite
Granite (Plutonic Igneous Rock)
igneous
Category
Mineral, Metal (Element)
Browse mineral, metal (element) specimens identified by the Rock Identifier community.
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Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Polished agate pendant (likely carnelian or plume agate)
Microcrystalline quartz, SiO₂ (chalcedony); exact variety cannot be confirmed from the image
gemstone
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Opalite
Synthetic glass (SiO2 + metal additions)
mineraloid
Titanium Quartz (Aura Quartz)
Silicon Dioxide (SiO2) treated with Titanium
mineral
Amethyst ring
Amethyst, purple quartz (SiO₂), likely set with diamond or other accent stones
gemstone
Bauxite
Aluminium ore consisting largely of the minerals gibbsite Al(OH)3, boehmite γ-AlO(OH) and diaspore α-AlO(OH)
sedimentary
Bauxite
Aluminum ore / Hydrated aluminum oxides
sedimentary
Granitic Pegmatite
Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8, Mica: KAl2(AlSi3O10)(OH)2)
Igneous
Turquoise color-bead and Hematite necklace
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
mineral
Diamond (in a jewelry setting)
Cubic Carbon (C)
mineral
Hollow geode or vesicular volcanic rock
Likely quartz-lined basaltic/andesitic vesicle; exact identification requires testing
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gold-bearing quartz or ironstone fragment
Quartz (SiO₂) with possible native gold and iron oxides
mineral
Diamond (in a gold setting)
Carbon (C)
mineral
Tiger Iron
Tiger Iron (Composition: SiO2, Fe2O3, Fe3O4)
metamorphic
Granite
Intrusive Igneous Rock
igneous
Slag
Metallurgical by-product
Anthropogenic (Man-made material)
Rounded greenish-gold rock or mineral pebble
Indeterminate; possibly serpentine-rich stone, weathered sulfide, or iron-stained metamorphic rock
mineral
Manganese Oxide Crust on Limestone
Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3
sedimentary
Quartz-rich hydrothermal mineral specimen, possibly vanadinite-bearing matrix
Quartz (SiO₂) with unidentified red-brown accessory minerals; exact species requires testing
mineral
Granite
Intrusive Igneous Rock
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Lepidolite
K(Li,Al)3(Al,Si,3O10)(F,OH)2
mineral
Peridot (Olivine)
Olivine ((Mg, Fe)2SiO4)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Decorative gemstone bracelet or jewelry
Unidentifiable from the blurred image; likely colored glass or synthetic stones, possibly mixed gemstone beads
gemstone
Gossan
Iron-rich regolith (mainly Limonite and Goethite, FeO(OH)·nH2O)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Beryl (likely Aquamarine or Heliodor variant)
Beryllium aluminum cyclosilicate (Be3Al2Si6O18)
mineral
Peridot
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Likely weathered mafic rock (basalt or gabbro)
Basalt–gabbroic rock; chiefly plagioclase feldspar, pyroxene, and possibly olivine
igneous
Blue Sapphire and Diamond (Set in Metal)
Corundum (Al2O3) and Diamond (C)
mineral
Granite
Intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Mica-bearing quartz rock (likely pegmatite)
Quartz–feldspar–mica pegmatite; dark mica is probably biotite, possibly muscovite or chlorite
igneous