Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Category
Mineral And Metamorphic Rock
Browse mineral and metamorphic rock specimens identified by the Rock Identifier community.
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Blue Aventurine
Silicon Dioxide (SiO2) containing Dumortierite or Crocidolite inclusions
mineral
Granite (Thin Section)
Granite (Felsic Plutonic Rock)
igneous
Tiger's Eye
Silicon dioxide with crocidolite fibers (SiO2 with chrysotile amphibole inclusions)
Mineral
Serpentine / Serpentinite
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Serpentine
Serpentine-group minerals (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Rough Ruby
Corundum (Al2O3 with Chromium impurities)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Serpentine
(Mg,Fe)3Si2O5(OH)4
metamorphic
Pyrite (Fools Gold)
Iron Sulfide (FeS2)
mineral
Quartz
Quartz (SiO₂)
Mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Tumbled dark stone, likely basalt or basaltic pebble
Fine-grained mafic volcanic rock; commonly composed of plagioclase, pyroxene, and minor olivine (basalt)
igneous
Tumbled quartz pebble
Quartz (silicon dioxide, SiO₂)
mineral
Iron-stained quartz (likely quartzite or quartz-rich rock)
Quartz, silicon dioxide (SiO₂), with iron-oxide staining
mineral
Rounded quartz-rich beach pebble
Likely milky quartz or quartzite (SiO₂)
mineral
Soil with Mineral Detritus and Quartz Fragments
Regolith / Silicate Mineral Aggregate
sedimentary
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Quartz
Silicon Dioxide (SiO₂)
Mineral
Tumbled greenish serpentine
Serpentinite; chiefly antigorite/lizardite, Mg₃Si₂O₅(OH)₄
metamorphic
Quartzite
Quartzite (Silicon Dioxide, SiO2)
metamorphic
Serpentinite
Serpentinite (composed primarily of serpentine group minerals like lizardite, antigorite, and chrysotile)
metamorphic
Goldstone (aventurine glass)
Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone
gemstone
Quartzite Pebble with Quartz Vein
Metamorphic Sandstone (Quartzite) with Hydrothermal Quartz
metamorphic
Garnet
Almandine-Pyrope group, X3Y2(SiO4)3
mineral
Garnet Schist
Almandine-Garnet Mica Schist
metamorphic
Xenolith in Basalt
Mafic Igneous Rock with Felsic Inclusion
igneous
Greisen (Quartz-Muscovite-Turretine Rock)
Greisen
Metamorphic Rock
Marble
Marbles are primarily composed of calcite (calcium carbonate, CaCO3) or dolomite (calcium magnesium carbonate, CaMg(CO3)2).
Metamorphic Rock
Quartzite (or Engineered Quartz Stone)
SiO2 (Silicon Dioxide)
metamorphic
Pyrite
Pyrite (Iron Disulfide), FeS2
Mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Rutilated Quartz
Quartz (SiO2) with Rutile (TiO2) inclusions
Mineral
Aventurine
Aventurine Quartz (SiO2 with inclusions)
Mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Tumbled quartz-rich stone, likely milky quartz
Quartz (SiO₂), possibly iron-stained milky quartz or quartzite
mineral
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Epidote with quartz/feldspar
Epidote, Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Rhodonite, Gray Moonstone, and White Feldspar Mix
Multiple: MnSiO3 (Rhodonite), (K,Na)AlSi3O8 (Feldspar/Moonstone)
mineral
Unakite
Altered Granite (Granitic Metamorphic Rock)
metamorphic
Quartzite with Mafic Inclusion
Metamorphic Quartzite / Mafic Host Rock
metamorphic
Marble
Metamorphic carbonate rock (Calcite/Dolomite)
metamorphic