Granite
Phaneritic Felsic Igneous Rock
igneous
Category
Mineral (Man Made Composite)
Browse mineral (man made composite) specimens identified by the Rock Identifier community.
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Malachite
Malachite (Copper Carbonate Hydroxide) - Cu2CO3(OH)2
Mineral
Quartz (Microcrystalline/Chert)
Silicon Dioxide (SiO2)
mineral
Desert Rose (Baryte or Gypsum Rose)
Baryte (BaSO4) or Gypsum (CaSO4·2H2O)
mineral
Fossilized Coral (Petoskey Stone / Hexagonaria)
Hexagonaria percarinata / Rugosa coral (CaCO3)
fossil
Cullet Glass (Strawberry Glass)
Amorphous Silicon Dioxide (SiO2) with metallic dopants
Mineraloid (Synthetic/Man-made)
Sandstone Pebble
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Granite
Granite (a phaneritic intrusive igneous rock)
igneous
Sandstone
Arenite
sedimentary
Breccia
Breccia
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2) with trace aluminum and irradiation
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Blue calcite sphere
Calcite (CaCO₃), commonly blue-calcite variety
mineral
Likely weathered iron-rich rock or slag fragment
Uncertain; possibly limonite/goethite-rich material (FeO(OH)·nH₂O)
mineral
Sandstone (likely Quartzose Sandstone)
Arenite
sedimentary
Flint
Silicon dioxide (SiO2)
sedimentary
Diorite (Gneissic)
Diorite
igneous
Decorative gemstone bracelet or jewelry
Unidentifiable from the blurred image; likely colored glass or synthetic stones, possibly mixed gemstone beads
gemstone
Amethyst
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Rutilated Quartz
Quartz with Rutile inclusions (SiO2 with TiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Synthetic Faux Fur Fursuit
Polyacrylonitrile / Polyester (Synthetic Textile)
not a rock (synthetic material/costume)
Sandstone
Arenite
sedimentary
Beaded gemstone bracelet, likely lapis lazuli and pale quartz/agate
Lapis lazuli: lazurite-rich rock, chiefly (Na,Ca)₈(AlSiO₄)₆(S,SO)₂; pale beads are uncertain
gemstone
Pink Granite (Alkali-feldspar Granite)
Felsic intrusive igneous rock (composition: KAlSi3O8, SiO2, NaAlSi3O8)
igneous
Pearl
Calcium Carbonate (mostly Aragonite), CaCO3 (with conchiolin)
mineral
Diamond (in jewelry setting)
Carbon (C)
mineral
Diamond (in jewelry setting)
Adamantine Carbon (C)
mineral
Jasper / Chert (Red)
Cryptocrystalline quartz (SiO2)
Sedimentary / Mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Blue glass-like tumbled specimen
Most likely cobalt-blue slag glass or manufactured glass; not confidently identifiable as a natural mineral from the image
mineral
Red Sandstone
Arenite (with Iron Oxide / Hematite staining)
sedimentary
Sandstone
Arenite
sedimentary
Amethyst (with Pyrite and other minerals)
Silicon Dioxide (SiO2)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Bauxite
Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))
sedimentary
Tumbled chalcedony (likely agate or jasper fragment)
Microcrystalline quartz, SiO₂ (chalcedony)
mineral
Weathered iron-rich rock, possibly jasper or ironstone
Likely limonite/goethite-bearing siliceous rock; exact identification requires hardness and streak tests
mineral
Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary