Pyrite (on host rock)
Iron Sulfide (FeS2)
Category
Browse this appears to be a man made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen. specimens identified by the Rock Identifier community.
Pyrite (on host rock)
Iron Sulfide (FeS2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Clear Quartz
Silicon Dioxide (SiO2)
Garnet (Almandine variety)
Almandine, Fe3Al2(SiO4)3
Smoky Quartz
Silicon Dioxide (SiO2)
Blue Sapphire
Corundum (Al2O3 with trace Titanium/Iron)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Basalt
Basalt (extrusive igneous rock)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Granitic Pegmatite Intrusion in Host Rock
Pegmatite dike in amphibolite or schist
Blue Lace Agate
Silicon Dioxide (SiO2)
Basalt with Scoria/Vesicular Texture
Vesicular Basalt (Iron-rich/Oxidized)
Amethyst
Amethyst (Silicon Dioxide, SiO2 with Iron impurities)
Rutilated Quartz
SiO2 with TiO2 inclusions
Turquoise (Green variety)
Hydrous phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
Topaz
Topaz (Al2SiO4(F,OH)2)
Pink Tourmaline in Quartz Matrix
Elbaite (Na(Li,Al)3Al6(Si6O18)(BO3)3(OH)4) in Quartz (SiO2)
Lapis Lazuli
Lapis Lazuli (A complex rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
Serpentine Jade (New Jade/Olive Jade)
Serpentinite (a rock composed primarily of serpentine minerals) / Mg3Si2O5(OH)4 for Antigorite and Lizardite
Fordite
Anthropogenic paint-rock
Lapis Lazuli
Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
Ruby (Raw Corundum)
Corundum (Al2O3:Cr)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
Quartzite (specifically an iron-stained or Carnelian-colored variety)
Silicon Dioxide (SiO2) with iron oxide inclusions
Picasso Stone
Metamorphosed Calcium Carbonate (Limestone)
Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
Beryl (Variety Mix)
Be3Al2(Si6O18)
Boulder Opal
Precious Opal in Ironstone (Amorphous Hydrated Silica, SiO2·nH2O)
Pyrite (Fool's Gold) Ore
Iron Disulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
Ruby
Corundum (Al₂O₃) with Chromium (Cr)
Fossil Sand Dollar (Echinoidea)
Phylum Echinodermata, Class Echinoidea (likely Dendraster or Scutella)
Blue Sapphire
Corundum (Al2O3 - Aluminum Oxide)
Golden Healer Quartz
Ferruginous Quartz (SiO2 with Fe2O3 inclusions)
Blue Topaz
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)