Turquoise cabochon
Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
mineral
Category
Man Made Object (Metal Alloy)
Browse man made object (metal alloy) specimens identified by the Rock Identifier community.
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Basalt
Basalt (Mafic volcanic rock)
igneous
Colorless Quartz (Rhinestone)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Copper Nugget
Native Copper (Cu)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Dyed Agate
Silicon Dioxide (SiO2) with artificial colorants
mineral
Pegmatitic granite
Coarse-grained granite, chiefly quartz, feldspar, and mica; likely a granitic pegmatite
igneous
Red Hematite
Iron(III) oxide (Fe2O3)
mineral
Limonite (often after Pyrite)
Limonite (FeO(OH)·nH2O)
mineral
Petrified Wood
Silicified wood (Quartz/Chalcedony)
Sedimentary
Digital Multimeter (Synthetic Object)
Digital Multimeter (DMM)
not a rock
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Ironstone Concretion
Ironstone (primarily Siderite or Limonite)
sedimentary
Basalt River Stone
Aphanitic Mafic Igneous Rock
igneous
Rough Blue Diamond
Carbon (C) - Type IIb Diamond
mineral
Limonite Concretion
FeO(OH)qnH2O (Hydrated iron(III) oxide-hydroxide mixture)
sedimentary
Hematite
Iron Oxide (Fe2O3)
mineral
Gold-bearing Quartz Ore
Auriferous Quartz (SiO2 + Au)
metamorphic
Gabbro
Gabbro (Mg,Fe)2Si2O6 and CaAl2Si2O8
igneous
Fluorite Cleavage Octahedron
Fluorite (Calcium Fluoride, CaF2)
mineral
Rose Quartz
Rose Quartz (SiO2 - Silicon Dioxide with trace amounts of titanium, iron, or manganese)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Milky quartz
Quartz, silicon dioxide (SiO₂)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Granite
Intrusive Igneous Rock
igneous
Gold Nugget
Native Gold (Au)
mineral
Gold Nugget
Native Gold (Au)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite
Hematite (Fe2O3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Specular Hematite
Hematite (Fe2O3)
mineral
Gold-bearing Quartz
Auriferous Quartz (SiO2 with native Au)
mineral
Gold Nugget
Native Gold (Au)
mineral
Serpentine (likely serpentinite)
Serpentinite; chiefly serpentine-group minerals (antigorite, lizardite, chrysotile), commonly with magnetite and chromite
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Carnelian
Carnelian (a variety of Chalcedony, which is a microcrystalline quartz, SiO₂)
Mineral
Lapis Lazuli
Lapis Lazuli (a rock composed primarily of Lazurite)
Metamorphic rock
Fluorite
Calcium Fluoride (CaF2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic