Gold Nugget
Gold (Au)
Category
Browse mineral (refined metal) specimens identified by the Rock Identifier community.
Gold Nugget
Gold (Au)
Gold Nugget
Gold (Au)
Polished carnelian agate pendant
Microcrystalline quartz (SiO₂), orange chalcedony; likely banded agate
Granite
Intrusive Igneous Rock
Meteorite
Chondrite or Achondrite stony-iron meteorite
Cassiterite (Tin Ore)
Cassiterite (Tin(IV) Oxide, SnO2)
Milky Quartz
Silicon Dioxide (SiO2)
Lepidolite Pebble
K(Li,Al)3(Al,Si,3O10)(F,OH)2
Copper Ore (Malachite and Azurite stained rock)
Cupriferous rock containing secondary copper carbonates
Celestine Geode
Strontium Sulfate (SrSO4)
Granite
Intrusive Igneous Rock
Uncertain small metallic-looking mineral/rock fragment
Indeterminate; possibly galena-bearing rock or metallic slag
Aura Quartz (Coated Quartz)
Silicon Dioxide (SiO2) coated with vaporized metals
Unidentified dark metallic sulfide specimen
Possibly pyrite-, chalcopyrite-, or galena-bearing ore; exact identification requires testing
Granite
Intrusive Igneous Rock
Granite
Intrusive Igneous Rock (Felsic)
Gold Nugget
Native Gold (Au)
Polished red jasper pendant
Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides
Diamond (Cluster Ring)
Carbon (C)
Granite
Felsic intrusive igneous rock
Celestine (Celestite)
Celestine (Strontium Sulfate, SrSO4)
Lepidolite
K(Li,Al)3(Si,Al)4O10(F,OH)2
Likely iron meteorite fragment
Unclassified Fe–Ni meteorite; possible stony-iron fragment
Granite
Felsic intrusive igneous rock
Granite
Intrusive igneous rock primarily composed of quartz, alkali feldspar, and plagioclase
Chalcopyrite in Matrix
CuFeS2
Metal-rich sulfide ore, likely galena-bearing rock
Galena (PbS) with pyrite/chalcopyrite in a host rock; exact identification requires testing
Gold Nugget
Gold (Au)
Sulfide Ore (likely Galena and Sphalerite in Quartz)
Lead-Zinc Ore (PbS and ZnS)
Tumbled green fluorite
Fluorite (calcium fluoride, CaF₂)
Pyrite
Iron Sulfide (FeS2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Slag (Industrial By-product)
Anthropogenic Vitreous Silica/Iron Silicate
Limonite (Ironstone)
Limonite (FeO(OH)·nH2O)
Gold-Bearing Quartz
Silicon Dioxide with Native Gold (SiO2 + Au)
Gold coin pendant on a chain
Gold (Au), likely a coin set in a gold-colored metal mount
Granite
Felsic intrusive igneous rock
Granite
Intrusive igneous rock composed mainly of quartz, alkali feldspar, and plagioclase
Turquoise bead bracelet
Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O (bead material may be stabilized or dyed)
Black beaded bracelet, likely black onyx or glass
Possibly chalcedony (microcrystalline quartz, SiO₂); the beads may instead be man-made glass
Olivine
(Mg,Fe)2SiO4
Polished brecciated jasper pendant
Silica-rich jasper (microcrystalline quartz, SiO₂), brecciated and cemented by silica or iron-rich material