Tumbled Amethyst and Smoky Quartz
Silicon Dioxide (SiO2) with impurities
mineral
Category
Mineral, Jewelry
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Amethyst
Quartz, purple variety — silicon dioxide (SiO₂)
gemstone
Blue-green cabochon pendant, likely turquoise or composite turquoise
Turquoise: hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact identification is uncertain from the blurred image
gemstone
Blue Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Onyx
Chalcedony (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Shark Tooth Fossil
Chondrichthyes fossil
fossil
Tiger's Eye
Silicon dioxide with crocidolite inclusions (SiO2)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Variscite
AlPO4·2H2O
mineral
Malachite
Copper Carbonate Hydroxide, Cu2CO3(OH)2
mineral
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Topaz
Al2SiO4(F,OH)2
mineral
Lapis Lazuli
Lazurite-rich metamorphic rock
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Blue Tiger's Eye
Silicon dioxide with crocidolite inclusions (SiO2)
gemstone
Small pink mineral fragment
Indeterminate; possibly rose quartz or feldspar
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Costume Jewelry Gemstones (Emerald-imitation and semi-precious beads)
BeCuAl6Si6O18 (Beryl structure), frequently simulated by glass or synthetic spinel
mineral
Blue Sapphire (likely costume glass imitation)
Corundum (Al2O3) with iron/titanium impurities
mineral
Tiger's Eye
Silicon dioxide with crocidolite inclusions, SiO2
gemstone
Tourmaline
Schorl (Sodium Iron Aluminum Borosilicate)
mineral
Hemimorphite
Hemimorphite (Zn4Si2O7(OH)2·H2O)
mineral
Tiger's Eye
Silicon Dioxide (Quartz pseudomorph after crocidolite), SiO2
mineral
Gold (10K Alloy)
Aurum (Au) with alloying metals (Cu, Ag, Zn)
mineral
Fossil Shark Tooth
Odontaspididae (Sand Tiger Shark family)
fossil
Fossilized Shark Tooth
Carcharodon (Galeocerdo sp. or Lamniform)
mineral
Jade (likely Jadeite or Nephrite)
Jadeite (NaAlSi2O6) or Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)
Mineral/Mineraloid
Lapis Lazuli
Lapis lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic
Picture Jasper
Silicon dioxide (SiO2) with mineral impurities
sedimentary
Diamond
Diamond (Pure Carbon, C)
mineral
Red gemstone, likely ruby
Corundum (Al₂O₃), colored red by chromium; identity cannot be confirmed from the photo
gemstone
Pyrite
Iron Sulfide (FeS2)
mineral
Fossilized shark tooth
Fossil shark tooth; exact shark species cannot be determined from this image
fossil
Shark Tooth Fossil
Otodus obliquus (or similar prehistoric lamniform shark tooth)
fossil
Clear quartz crystal (tentative)
Quartz, silicon dioxide (SiO₂)
mineral
Small polished gemstone chips, likely mixed quartz varieties
Quartz (SiO₂), possibly including smoky quartz and other varieties; exact identification is uncertain from the image
gemstone
Chrysocolla on Matrix
Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Polished picture jasper heart pendant
Picture jasper (microcrystalline quartz, SiO₂, with iron-oxide and clay inclusions)
sedimentary
Tumbled green aventurine (likely)
Quartz, SiO₂, with green fuchsite or other mineral inclusions
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Mineral
Silicon Dioxide (SiO2)
mineral