Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Category
Synthetic Or Natural Fiber
Browse synthetic or natural fiber specimens identified by the Rock Identifier community.
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Unknown Organic Object (likely a berry or fruit)
Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.
Organic Material (likely a fruit or berry)
Quartzite
Quartzite (SiO2)
metamorphic
Quartz (various varieties)
SiO₂ (Silicon Dioxide)
Mineral
Chert / Flint
Chert (varieties include Flint)
Sedimentary
Citrine (Heat-treated or Natural Quartz)
Silicon Dioxide (SiO2)
mineral
Pebble (likely a type of sandstone or quartzite pebble)
Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.
Sedimentary rock
Baroque Pearl (and potentially a small Sapphire/Blue Topaz)
Pearl: Calcium Carbonate (aragonite or calcite) with conchiolin. Sapphire: Aluminum Oxide (Al2O3). Blue Topaz: Al2SiO4(F,OH)2.
Organic Gemstone (for pearl), Mineral (for sapphire/topaz)
Painted River Rock
Painted Quartzite or Smooth Siltstone
sedimentary
Cubic Zirconia (Set in Jewelry)
Zirconium Dioxide (ZrO2)
gemstone
Cobalt Glass Slug (Man-made Glass)
Amorphous Silica with Cobalt Oxide (SiO2 + CoO)
mineraloid
Silicon Carbide (Carborundum)
Moissanite (SiC)
mineral
Silicon
Element Si
mineral
Cubic Zirconia (Faceted)
Zirconium dioxide (ZrO2)
mineral
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Cubic Zirconia (Simulated Diamond)
Zirconium dioxide (ZrO2)
mineral
Bismuth Crystal
Bismuth (element symbol Bi, atomic number 83)
mineral
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with Iron Oxide inclusions)
metamorphic
Cubic Zirconia (Simulated Diamond)
Zirconium Dioxide (ZrO2)
mineral (synthetic)
Silicon
Element Si
mineral
Blue Goldstone
Man-made glass with crystalline copper/cobalt inclusions
mineral
Tiger's Eye (likely variant or dark tumble)
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Magnetite or Hematite-rich Ore
Magnetite (Fe3O4) or Hematite (Fe2O3)
mineral
Red Tiger's Eye
Silicified Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide)
metamorphic
Carborundum (Silicon Carbide)
Silicon carbide (SiC)
mineral
Red Tiger Eye (or Polished Jasper Gneiss)
Silicon dioxide with crocidolite inclusions (SiO2)
metamorphic
Staurolite (Fairy Stone)
Staurolite (Fe2+2Al9Si4O23(OH))
metamorphic
The user-provided image does not contain a rock or mineral specimen
N/A
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral (synthetic)
Basalt
Basalt
igneous
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
man-made (synthetic rock)
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
mineral (synthetic)
Banded Agate (variety of Chalcedony)
Agate (SiO2)
mineral
Paper (Cellulose)
Cellulose (C6H10O5)n
Organic (Anthropogenic)
Man-made Synthetic Material (Costume Faux Fur)
Synthetic Polymer (Polyester/Acrylic)
not a rock
Man-made earbud charging case (Not a rock or mineral)
Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components
Synthetic/Man-made object
Amber (and Cubic Zirconia)
Fossilized Tree Resin
mineraloid
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Shark Tooth Fossil
Lamniformes (Shark tooth fossil composed of Fluorapatite)
fossil