Gold
Native Gold (Au)
mineral
Category
Mineral, Metal (Element)
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Gold
Gold (Au)
mineral
Cubic Zirconia (as used in jewelry setting)
Zirconium dioxide (ZrO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite pebble
Quartzite (SiO2) with iron oxide staining
metamorphic
Gossan
Ferruginous gossan (Iron-rich capping)
sedimentary
Possible iron-rich meteorite fragment
Undetermined; possible stony-iron or iron-oxide-rich meteorite
meteorite
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
Gold-bearing quartz (probable sulfide-bearing quartz)
Quartz, SiO₂, with possible pyrite or mica inclusions
mineral
Gold Nugget
Gold (Au)
mineral
Aura Quartz (specifically Titanium Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti Coating)
mineral
Iron-Stained Quartz/Quartzite
Silicon Dioxide (SiO2) with iron oxides (Limonite/Hematite)
metamorphic
Serpentinite
Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)
metamorphic
Granite Pebble
Intrusive Igneous Rock (Quartz, Feldspar, Mica)
igneous
Sandstone (Red)
Arenite (Fe2O3 heavy)
sedimentary
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Native gold nuggets (likely gold-bearing specimen)
Native gold, Au; possibly associated quartz or sulfide matrix
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Beryl (Emerald Variety)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Eudialyte
Eudialyte (Na4(Ca,Ce)2(Fe2+,Mn,Y)ZrSi8O22(OH,Cl)2)
mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Ruby and Sapphire Cluster Ring
Corundum (Al2O3)
gemstone
Gossan (Iron Hat)
Limonitic Gossan (Fe2O3·nH2O)
sedimentary
Bauxite
Bauxite (Mixture of Hydrous Aluminum Oxides)
sedimentary
Gold Ore (in Quartz/Pyrite)
Native Gold (Au) with Quartz (SiO2) and Pyrite (FeS2)
mineral
Quartz Vein in Schist
Quartz (SiO2) in Pelitic Schist
metamorphic
Quartzite (Milky Quartz pebble)
Silicon Dioxide (SiO2)
metamorphic
Red Sandstone (Iron-Rich)
Arenite (Fe2O3)
sedimentary
Aura Quartz (Rainbow Quartz)
Silicon Dioxide (SiO2) with metallic vapor coatings
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Titanium-coated Metal Cube (Man-made Fidget Toy)
Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)
Mineral alternative / Synthetic
Native copper (probable copper-rich mineral specimen)
Copper, Cu; possibly mixed with cuprite, malachite, and iron-oxide alteration minerals
mineral
Blue calcite (likely)
Calcite, calcium carbonate (CaCO₃)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Pyrite in Matrix with Copper Alterations
Iron Sulfide (FeS2) with secondary Copper carbonates/sulfides
mineral
Aura Quartz (Titanium or Angel Aura coated)
Silicon Dioxide (SiO2) with metallic vapor coating
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral