Iron-Stained Quartz/Quartzite
Silicon Dioxide (SiO2) with iron oxides (Limonite/Hematite)
metamorphic
Category
Mineral (Refined Metal)
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Serpentinite
Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)
metamorphic
Likely hematite-rich ironstone or metallic mineral fragment
Hematite (Fe₂O₃), possibly with magnetite (Fe₃O₄) or metallic iron
mineral
Native Copper in Matrix
Native Copper (Cu)
mineral
Natural Gold Nugget
Native Gold (Au)
mineral
Opalite
Synthetic Glass (Hydrated Silica Simulant)
mineral
Aura Quartz Geodes (Lab-Altered)
Silicon Dioxide (SiO2) with Metallic Vapor Deposition
mineral
Lepidolite
K(Li,Al)3(Al,Si,3O10)(F,OH)2
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Rough Emerald Crystals
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Sandstone (Quartzose Sandstone / Feldspathic Sandstone)
SiO2 with minor impurities (Fe2O3, KAlSi3O8)
sedimentary
Quartz Vein in Schist / Gneiss
Silicon Dioxide (SiO2) in Metamorphic Matrix
igneous
Gossan (Iron Hat)
Limonitic Gossan (Fe2O3·nH2O)
sedimentary
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Gossan
Ferruginous gossan (Iron-rich capping)
sedimentary
Granite Pebble
Intrusive Igneous Rock (Quartz, Feldspar, Mica)
igneous
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2
metamorphic
Eudialyte
Eudialyte (Na4(Ca,Ce)2(Fe2+,Mn,Y)ZrSi8O22(OH,Cl)2)
mineral
Gold Ore (in Quartz/Pyrite)
Native Gold (Au) with Quartz (SiO2) and Pyrite (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Cubic Zirconia (as used in jewelry setting)
Zirconium dioxide (ZrO2)
mineral
Quartz Vein in Schist
Quartz (SiO2) in Pelitic Schist
metamorphic
Gold Nugget
Gold (Au)
mineral
Aura Quartz (specifically Titanium Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti Coating)
mineral
Quartzite pebble
Quartzite (SiO2) with iron oxide staining
metamorphic
Bauxite
Bauxite (Mixture of Hydrous Aluminum Oxides)
sedimentary
Pyrite
Iron Pyrite (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite in Matrix with Copper Alterations
Iron Sulfide (FeS2) with secondary Copper carbonates/sulfides
mineral
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Red)
Arenite (Fe2O3 heavy)
sedimentary
Red Sandstone (Iron-Rich)
Arenite (Fe2O3)
sedimentary
Aura Quartz (Rainbow Quartz)
Silicon Dioxide (SiO2) with metallic vapor coatings
mineral
Blue Celestite
Celestine (Strontium Sulfate, SrSO4)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Beryl (Emerald Variety)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Aura Quartz (Titanium or Angel Aura coated)
Silicon Dioxide (SiO2) with metallic vapor coating
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Opalite
Man-made opalized glass
mineral
Gold
Native Gold (Au)
mineral
Gold
Native Gold (Au)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral