Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Metal)
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Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Copper Ore (likely Malachite or Chrysocolla staining)
Copper Secondary Mineral (e.g., Cu2CO3(OH)2)
mineral
Beryl in Quartz Matrix
Beryllium Aluminum Silicate (Be3Al2Si6O18)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Bauxite
Aluminium ore (Hydrated aluminium oxides AlOx(OH)3-2x)
sedimentary
Amber jewelry (possibly amber-colored glass or resin)
Amber — fossilized plant resin, chiefly composed of polymerized terpenoids; the pictured material cannot be confirmed from the image
gemstone
Fluorite
Calcium Fluoride (CaF2)
mineral
Granite
Granite (Intrusive Igneous Rock)
igneous
Quartz Vein in Host Rock
Hydrothermal Quartz (SiO2) in Slates/Schists
metamorphic
Gold Ore (Auriferous Quartz with Chalcopyrite/Pyrite)
Au (Native Gold) in Quartz (SiO2) with FeS2 (Pyrite) or CuFeS2 (Chalcopyrite)
Mineral
Lepidolite
K(Li,Al)3(Al,Si,IV)4O10(F,OH)2
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
mineral
Amber cabochon pendant
Amber (fossilized tree resin; chiefly polymerized terpenoids)
gemstone
Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Bismuth crystal
Bismuth (Bi), commonly laboratory-grown
mineral
Slag Glass
Silicon dioxide with impurities
mineral
Bismuth crystal aggregate
Bismuth (Bi), commonly laboratory-grown
mineral
Small brown mineral/rock fragment
Indeterminate; possibly weathered quartz-rich rock, ironstone, or a sulfide mineral
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Beryl (likely Aquamarine or Green Beryl)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Slag
Anthropogenic Vitreous Silicate / Ferro-silicate Slag
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Quartz Vein in Host Rock (Gneiss/Schist)
Silicon Dioxide (SiO2) within a metamorphic matrix
metamorphic
Quartz cabochon turtle pendant
Quartz (SiO₂), likely a translucent variety with natural inclusions
gemstone
Opalite-style glass pendant
Man-made opalescent glass (not natural opal)
mineral
Bauxite
Bauxite (Al2O3·2H2O)
sedimentary
Bauxite
Al2O3·2H2O (Aluminum Hydroxide)
sedimentary
Granite
Intrusive Igneous Rock (Felsic)
igneous
Green Aura Quartz (Titanium treated Kyanite or Quartz)
Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating
mineral (man-made aura treatment)
Quartz-bearing Pegmatite with Metallic Sulfides
Pegmatite / Quartz-Feldspar Matrix with Pyrite and Mica
igneous
Native Gold Flake
Gold (Au)
mineral
Aura Quartz Geode
Titanium/Gold bonded Quartz (SiO2 with metallic coating)
mineral
Gossan (with Limonite and Hematite)
Gossanous iron-oxide rock (Fe2O3 · nH2O)
sedimentary
Metal Alloy (Likely Pewter or Sterling Silver)
Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).
Man-made material (metal)
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Granite
Intrusive Igneous Rock
igneous
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Blue topaz-style pendant gemstone
Likely blue topaz (Al₂SiO₄(F,OH)₂); the image cannot confirm the stone or whether it is natural or synthetic.
gemstone