Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Man Made Material (Metal)
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Gneiss (High-grade Metamorphic Rock)
Gneiss (Metamorphic silicate rock)
metamorphic
Iron-stained Quartz (Gossan/Limonite-coated Quartz)
Silicon Dioxide (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)
mineral
Limonite (Iron Stone/Gossen)
Limonite (FeO(OH)·nH2O)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Chert (Dark Variety / Flint)
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Beryl (var. Heliodor or Aquamarine)
Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)
mineral
Beryl (Emerald Variety)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Celestine (Celestite)
Strontium sulfate (SrSO4)
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Chert (variations include Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Iron Meteorite
Siderite (Iron-Nickel Meteorite)
meteorite
Gold-bearing Quartz Ore
Auriferous Quartz (SiO2 with Au)
mineral
Native Copper
Native Copper (Cu)
mineral
Serpentinite
Serpentine rock (Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Tiger Iron
Tiger Iron (Composition: SiO2, Fe2O3, Fe3O4)
metamorphic
Chondrite Meteorite
Stony Meteorite (Chondrite)
igneous
Quartz
Silicon dioxide (SiO₂)
Mineral
Pyrite (on a metal substrate)
Iron Sulfide (FeS2)
mineral
Silver (S925)
Native Silver (Ag)
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Gold Nugget
Native Gold (Au)
mineral
Gold Nugget
Native Gold (Au)
mineral
Serpentinite
Serpentinite (composed largely of serpentine group minerals including antigorite, lizardite, and chrysotile)
metamorphic
Gold Nugget
Native Gold (Au)
mineral
Quartz-rich pegmatite with mica
Granitic pegmatite; chiefly quartz (SiO₂), feldspar, and muscovite/biotite mica
igneous
Pyrite in Matrix with Copper Alterations
Iron Sulfide (FeS2) with secondary Copper carbonates/sulfides
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Serpentine
Antigorite/Chrysotile/Lizardite mixture (Mg,Fe)3Si2O5(OH)4
metamorphic
Pyrite in Shale
Iron Disulfide (FeS2) in Argillaceous Shale
sedimentary
Pyrite (Iron Pyrite)
Iron Sulfide (FeS2)
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)
metamorphic
Dyed and Metallic Coated Agate Geode
Silicon Dioxide (SiO2) with titanium/gold vapor deposition coating
sedimentary (primary) with artificial modification
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Iron Meteorite Fragment
Siderite (Geological term for iron meteorite class - Fe/Ni alloy)
igneous
Milky Quartz with Mica Matrix
SiO2 (Silicon Dioxide) with Muscovite/Biotite mica
mineral