Quartz (Clear or Milky)
Silicon Dioxide (SiO2)
mineral
Category
Man Made Material (Jewelry, Metal Alloy)
Browse man made material (jewelry, metal alloy) specimens identified by the Rock Identifier community.
Learn about Man Made Material (Jewelry, Metal Alloy) in the encyclopedia
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Native Copper Nugget
Native Copper (Cu)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide)
igneous
Iron meteorite fragment (likely weathered meteorite)
Fe–Ni metal, commonly kamacite with taenite; possible stony-iron or iron-oxide fusion crust
meteorite
Coquina Limestone
Coquina (Biogenic Limestone)
sedimentary
Gold
Gold (Au)
mineral
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2
metamorphic
Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite
mineral
Weathered iron-rich sandstone or ironstone
Ferruginous sandstone, likely limonite/goethite-cemented quartz arenite
sedimentary
Gold Ore
Native Gold (Au)
mineral
Gold in Quartz Matrix
Native Gold (Au) with Quartz (SiO2) and Slate/Shale
mineral
Iron Meteorite
Siderite (Fe, Ni)
igneous
Vesicular basalt (scoria-like volcanic rock)
Basalt, predominantly plagioclase + pyroxene ± olivine; vesicular variety
igneous
Emerald in Matrix
Beryl (Be3Al2Si6O18) containing Chromium/Vanadium impurities
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Amethyst (as seen in jewelry)
Amethyst (Silicon Dioxide SiO2 + Fe4+)
mineral
Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)
N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)
Organic (if resin) or Synthetic (if glass); simulating Sedimentary or Metamorphic (for natural stones)
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide)
igneous
Amazonite
K(AlSi3O8) - Potassium Aluminum Silicate (color due to lead)
mineral
Aquamarine in Onyx / Blue Topaz Pendant
Beryl (Be₃Al₂Si₆O₁₈) or Topaz (Al₂SiO₄(F,OH)₂)
gemstone
Pearl (Biogenic Mineraloid)
Calcium carbonate (CaCO3) primarily as Aragonite
mineral
Quartz Pebble (Beach Chalcedony)
Silicon Dioxide (SiO2)
mineral
Gold
Native Gold (Au)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Mixed Gemstone Beaded Jewelry
Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)
Mineral
Common Marble
Calcium Carbonate (CaCO3)
metamorphic
Gold Nugget
Native Gold (Au)
mineral
Gold-bearing Quartz Ore
Auriferous Quartz (SiO2 with Au)
mineral
Pyrite (on host rock/ore)
Iron Sulfide (FeS2)
mineral
Turquoise
Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
gemstone
Dyed Agate Slice
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Ruby and Sapphire Cluster Ring
Corundum (Al2O3)
gemstone
Diamond
Carbon (C)
mineral
Pink Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Dyed Purple Agate Sliced
Silicon Dioxide (SiO2) with artificial pigment
mineral
Pearl
Biogenic CaCO3 (Aragonite and Calcite)
mineral
Banded Black Onyx (Chalcedony)
Silicon Dioxide (SiO₂)
mineral
Gold Ore (in Quartz/Pyrite)
Native Gold (Au) with Quartz (SiO2) and Pyrite (FeS2)
mineral
Gold Nugget
Native Gold (Au)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral