Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Category
Man Made
Browse man made specimens identified by the Rock Identifier community.
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Amazonite (or Amazon Stone)
Potassium Feldspar (Microcline), K(AlSi3O8)
mineral
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Ferruginous)
Arenite (with Goethite/Limonite cement)
sedimentary
Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
White Agate (Chalcedony)
Agate (Silicon Dioxide - SiO2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Kyanite
Kyanite (Al2SiO5)
Mineral
Sandstone (Ferruginous)
Clastic Sedimentary Rock (Sandstone)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Feldspar-rich Pegmatite
Granitic Pegmatite (principally KAlSi3O8)
igneous
Sandstone (Quartzose)
Arenite (Formula: SiO2 primary, with various cements)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Gray Limestone Fragment
Limestone (CaCO3)
sedimentary
Tumbled Mixed Gemstones (Quartz and Rutile)
Silicon Dioxide (SiO2) with various inclusions
mineral
Dyed Fuchsia Tiger’s Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Red Garnet
Almandine and Pyrope (Silicate minerals: Fe3Al2(SiO4)3 and Mg3Al2(SiO4)3)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Obsidian
Obsidian (Volcanic Glass)
igneous
Petrified Wood
Silicified wood (Quartz, SiO2)
metamorphic
Banded Agate (specifically Lake Superior Agate type)
Silicon Dioxide (SiO2) - variety Chalcedony
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
White Jade (Nephrite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Sandstone (specifically Arkose or Ferruginous Sandstone)
Sandstone (SiO2 with iron oxide inclusions)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Serpentine
Serpentinite (composed mainly of Group Minerals Antigorite, Chrysotile, and Lizardite; Mg3Si2O5(OH)4)
metamorphic
Sandstone
Arenite or Sandstone
Sedimentary Rock
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Microcrystalline Limestone
Limestone (CaCO3 with impurities)
sedimentary
Sandstone (Ferruginous)
Arenite (with Iron Oxides)
sedimentary
Granitic Gneiss
Gneiss (quartz-feldspar-mica complex)
metamorphic
Banded Jasper
Microcrystalline Quartz (SiO2) with iron inclusions
sedimentary