Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
mineral
Category
Mineral, Metal (Element)
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Gossan
Iron-rich regolith (mainly Limonite and Goethite, FeO(OH)·nH2O)
sedimentary
Manganese Oxide Crust on Limestone
Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3
sedimentary
Granite
Intrusive Igneous Rock
igneous
Beryl (likely Aquamarine or Heliodor variant)
Beryllium aluminum cyclosilicate (Be3Al2Si6O18)
mineral
Peridot
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Bauxite
Aluminium ore consisting largely of the minerals gibbsite Al(OH)3, boehmite γ-AlO(OH) and diaspore α-AlO(OH)
sedimentary
Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)
Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy
Mineral (synthetic) and Metal (precious/base)
Granite
Intrusive igneous rock (Felsic)
igneous
Granite
Intrusive Igneous Rock
igneous
Tree Agate
Chalcedony (SiO2) with Dendritic inclusions
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Granite
Felsic intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive igneous rock
igneous
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Granite
Intrusive igneous rock
igneous
Quartz Vein in Siltstone
SiO2 (Quartz) on clastic sedimentary matrix
sedimentary
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Native Copper
Copper (Cu)
mineral
Quartz vein in Host Rock
Crystalline Silicon Dioxide (SiO2) in Lithic Matrix
metamorphic
Chalcopyrite on Quartz
Copper Iron Sulfide (CuFeS2)
mineral
Granite
Felsic intrusive igneous rock
igneous
Granite Pebble
Phaneritic intrusive igneous rock
igneous
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Black tourmaline (likely schorl), polished cabochon
Schorl tourmaline, NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Milky Quartz
Quartz (Silica / Silicon Dioxide - SiO2)
mineral
Granite Pebble
Granite
igneous
Bismuth crystal
Bismuth (Bi), commonly laboratory-grown hopper crystal
mineral
Polished banded agate, likely moss or dendritic agate
Microcrystalline quartz (chalcedony), SiO₂, with iron/manganese inclusions
mineral
Gold Nugget
Native Gold (Au)
mineral
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
gemstone
Quartz-veined Metamorphic Rock
Quartz Vein in Phyllite or Schist (SiO2 in Silicate Matrix)
metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within metamorphic/igneous matrix
igneous/metamorphic
Iron Slag
Iron/Steel Slag (Ferrosilicate Glass)
industrial byproduct (anthropogenic material)
Beryl (Aquamarine)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Black-and-white agate geode pendant
Agate (microcrystalline quartz, SiO₂), likely a hollow geode slice with chalcedony and drusy quartz
mineral
Blue Sapphire and Diamond (Set in Metal)
Corundum (Al2O3) and Diamond (C)
mineral
Cream Marble (Speckled)
Metamorphosed Limestone (mainly CaCO3)
metamorphic