Black Tourmaline (Schorl) in Matrix
NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
mineral
Category
Mineral, Jewelry
Browse mineral, jewelry specimens identified by the Rock Identifier community.
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Beaded Jewelry (Assorted Gemstones)
Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ
Mineral, Jewelry
Fossil Coral (Rugose Coral / Horn Coral fragment)
Rugosa (Tetracoralla) / Calcite (CaCO3)
fossil
Blue sodalite beads
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂
mineral
Likely serpentinized ultramafic rock (serpentinite)
Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, possibly with magnetite, chromite, and brucite
metamorphic
Cubic Zirconia (CZ)
Zirconium dioxide (ZrO2)
mineral
Spiny Oyster Shell
Spondylus (Calcium Carbonate, CaCO3)
mineral
Gemstone Ring
Various (Likely Glass, Cubic Zirconia, or assorted semi-precious stones)
gemstone
Not a rock, mineral, or geological specimen
N/A
Chakra Crystal Bracelet
Mixed Mineral Assortment
gemstone
Quartz (Smoky/Brown variety)
Silicon dioxide (SiO2)
mineral
Cubic Zirconia (Man-made)
Cubic Zirconia (ZrO2) with Enamel and Metal Alloy
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Cubic Zirconia
Cubic Zirconium Dioxide (ZrO2)
gemstone
Man-made Jewelry Charm (Enameled Metal)
Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.
Synthetic / Manufactured Artifact
![Mystic Topaz (Treated Quartz or Topaz) (Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2] with thin-film metallic coating) — gemstone](https://media.rock.id/mystic-topaz-treated-quartz-or-topaz-b5749325-4a81-403d-a0ed-452e3335d125-thumbnail.jpg)
Mystic Topaz (Treated Quartz or Topaz)
Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2] with thin-film metallic coating
gemstone
Turquoise (Dyed Howlite/Magnesite imitation)
CuAl6(PO4)4(OH)8·4H2O (Target mineral) / Ca2B5SiO9(OH)5 (Actual specimen: Howlite)
mineral
Nephrite Jade
Nephrite
Mineral/Rock
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Shark Tooth Fossil
Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)
fossil
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Malachite-bearing Rock
Cu2CO3(OH)2
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Ruby (in costume jewelry context)
Corundum (Al2O3) with Chromium impurities
mineral
Green cabochon gemstone pendant, likely turquoise or dyed green turquoise
Probably turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact identification requires testing
gemstone
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Tumbled Mixed Gemstones and Rocks
Various mineral species including quartz (SiO2) and silicate minerals
mineral
Schist
Schist
Metamorphic
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Shark Tooth Fossil
Chondrichthyes (class) fossilized tooth
fossil
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Turquoise
Turquoise, CuAl6(PO4)4(OH)8·4H2O
mineral
Shark Tooth Fossil
Vertebrate fossilized tooth
fossil
Smoky Quartz with Rutile Inclusions
Silicon Dioxide (SiO2) with TiO2 needles
mineral
Quartz with Tourmaline inclusions
Silicon Dioxide (SiO2) with Tourmaline needles
mineral
Geode half
Geode (often quartz/chalcedony based)
sedimentary or igneous
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation
SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)
mineral
Jet
Lignite (Anthracite-grade compact coal)
sedimentary
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral