Quartz Vein in Host Rock (Gabbro or Basalt)
Silicon Dioxide (SiO2) with Mafic Silicates
metamorphic/igneous
Category
Mineral (Refined Metal)
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Iron Slag
Iron/Steel Slag (Ferrosilicate Glass)
industrial byproduct (anthropogenic material)
Pyrite
Iron Disulfide (FeS2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Beryl (Aquamarine)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Native Silver Nugget
Silver (Ag)
mineral
Limonite and Goethite encrusted Quartz (Iron-stained Gossan)
FeO(OH)·nH2O (Limonite) / FeO(OH) (Goethite) on SiO2 (Quartz)
mineral
Quartz Vein in Host Rock
Crystalline Silicon Dioxide (SiO2) in Igneous/Metamorphic Matrix
mineral
Quartz Vein in Sedimentary Matrix
Silicon Dioxide (SiO2) with host rock
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
mineral
Gossan (Limonite/Ironstone)
Hydrated Iron Oxide (FeO(OH)·nH2O)
sedimentary
Native Copper
Native Copper (Cu)
mineral
Chalcopyrite on Quartz
Copper Iron Sulfide (CuFeS2)
mineral
Granite Boulder
Felsic Intrusive Igneous Rock
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Granite
Felsic intrusive igneous rock
igneous
Blue Sapphire and Diamond (Set in Metal)
Corundum (Al2O3) and Diamond (C)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Cream Marble (Speckled)
Metamorphosed Limestone (mainly CaCO3)
metamorphic
Quartz-rich pegmatite with mica
Granitic pegmatite; chiefly quartz (SiO₂), feldspar, and muscovite/biotite mica
igneous
Likely weathered metallic mineral or slag fragment
Indeterminate; possibly iron-rich sulfide/oxide material or industrial slag
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gold-bearing Quartz
Auriferous Quartz (SiO2 with Native Gold inclusion)
mineral
Pallasite Meteorite (Sliced and Polished)
Pallasite (Iron-Nickel Matrix with Olivine crystals)
mineral
Peacock Ore (Chalcopyrite)
Chalcopyrite (CuFeS2)
mineral
Gold Ore in Quartz
Native Gold (Au) in Quartz (SiO2) matrix
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) containing Chromium/Vanadium impurities
mineral
Lepidolite
K(Li,Al)3(Al,Si,3O10)(F,OH)2
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb,Cs)4O10(F,OH)2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Zircon
Zircon (Zirconium Silicate - ZrSiO4)
mineral
Goethite / Limonite Gossan
Hydrated Iron Oxide (FeO(OH))
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 inclusions)
sedimentary
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Granite
Granite (felsic intrusive igneous rock)
igneous
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) vein cutting through host rock
mineral
Gold Nuggest
Native Gold (Au)
mineral
Gold
Native Gold (Au)
mineral
Silver (Jewelry form)
Native Silver (Ag)
mineral