Quartz with Chlorite / Greenschist
Quartz vein in Greenschist (SiO2 with Chlorite group minerals)
metamorphic
Category
Mineral, Metal (Element)
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Sphalerite
Zinc Sulfide (ZnS)
mineral
Yellow faceted gemstone earrings, likely citrine or yellow beryl
Citrine: quartz, SiO₂; possible yellow beryl: Be₃Al₂Si₆O₁₈
gemstone
Gold Nugget
Native Gold (Au)
mineral
Gold
Native Gold (Au)
mineral
Schist with Quartz Veins
Schist with Quartz (SiO2)
metamorphic
Polished red gemstone pendant, likely red jasper or brecciated jasper
Jasper: microcrystalline quartz (SiO₂), commonly with hematite or iron-oxide inclusions
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gold Nugget Jewelry
Native Gold (Au)
mineral
Gold Flake
Native Gold (Au)
mineral
Aura Turquoise or Treated Turquoise Beads
Hydrated copper and aluminum phosphate (CuAl6(PO4)4(OH)8·4H2O) with metallic coating
gemstone
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in Altered Host Rock
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Granodiorite
Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)
igneous
Pallasite Meteorite
Pallasite (Iron-Nickel Matrix with Olivine/Peridot inclusions)
Mineral / Extraterrestrial Rock
Pyrite
Iron Sulfide (FeS2)
mineral
Slag (Industrial Glass Slag)
Amorphous Silicate Glass (often containing Al, Ca, Mg, and Ti oxides)
Mineraloid (Industrial byproduct)
Olivine in Basalt matrix
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
igneous
Opalite
Synthetic Opalite (Man-made glass)
mineral
Aura Quartz (Pink/Rose Aura Quartz)
Silicon Dioxide (SiO2) bonded with Platinum and/or Silver
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite (on Quartz/Host Rock)
Iron Sulfide (FeS₂)
mineral
Rose Quartz
SiO2 (Crystalline Quartz with trace inclusions)
mineral
Smoky Quartz
Silicon Dioxide (SiO₂)
mineral
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8); variety of Orthoclase Feldspar
mineral
Slag Glass
Amorphous Silica Glass (with metal oxide inclusions)
Mineraloid / Industrial Waste
Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Mica-rich schist
Muscovite–biotite schist, commonly quartz-bearing
metamorphic
Quartz-rich pegmatite, possibly with mica and iron staining
Quartz (SiO₂) with probable muscovite/biotite mica and minor iron oxides
igneous
Black Onyx
Onyx (Silicon Dioxide, SiO2)
mineral
Diamond (in jewelry)
Cubic Carbon (C)
mineral
Cubic Zirconia
Cubic Zirconia (Zirconium Dioxide, ZrO2)
mineral
Pegmatite with Lepidolite and Feldspar
Pegmatite (containing K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 and KAlSi3O8)
igneous
Diamond (Cut Gemstones in Jewelry)
Carbon (C)
gemstone
Gold
Native Gold (Au)
mineral
Michigan Float Copper
Native Copper (Cu)
mineral
Rounded basaltic river pebble
Basalt, predominantly plagioclase and pyroxene, commonly with olivine and iron oxides
igneous
Possible metallic meteorite or iron-nickel bead
Unconfirmed; possible Fe–Ni alloy (kamacite/taenite)
meteorite
Copper-bearing Quartz (likely Malachite on Quartz matrix)
Cu2CO3(OH)2 (Malachite) on SiO2 (Quartz)
mineral
Weathered quartz-bearing rock, possibly iron-stained quartzite or granitic pegmatite
Indeterminate; likely quartz-rich silicate rock with iron-oxide staining (SiO₂-dominant)
igneous
Green agate/chalcedony bead necklace
Microcrystalline quartz (SiO₂), likely green chalcedony or dyed green agate
gemstone