Mineral (Processed Alloy)

Aquamarine

Beryllium aluminum silicate (Be3Al2Si6O18)

Gold Nugget

Gold (Au)

Native Gold Flake

Gold (Au)

Celestite (Celestine)

Strontium sulfate (SrSO4)

Galena

Galena (lead sulfide, PbS)

Copper-bearing sulfide ore, possibly bornite/chalcopyrite

Likely bornite (Cu5FeS4) and/or chalcopyrite (CuFeS2) in a sulfide-rich host rock

Galena (likely argentiferous galena)

Galena, PbS; commonly cubic or massive lead sulfide, sometimes containing silver

Silver-gray metallic ore, possibly galena-bearing rock

Likely galena (PbS) in a host rock, but identification is uncertain from the photograph

Bismuth crystal

Bismuth (Bi), commonly laboratory-grown hopper crystal

Gold-bearing quartz or iron-stained quartzite

Quartz (SiO₂), possibly with native gold and iron oxides

Gold Nuggests

Native Gold (Au)

Gold-bearing quartz vein in dark host rock

Native gold (Au) with quartz (SiO₂), likely in slate, schist, or altered volcanic rock

Native Gold Nugget

Native Gold (Au)

Radiating stibnite crystals

Stibnite (antimony sulfide, Sb₂S₃)

Galena

Galena (lead sulfide, PbS), possibly a galena-rich ore specimen

Bismuth crystal aggregate

Bismuth (Bi), commonly laboratory-grown

Tiffany Stone

Bertrandite (Be4Si2O7(OH)2) mixed with Fluorite (CaF2), Opal, and Chalcedony

Pink/red faceted gemstone, likely synthetic ruby or pink sapphire

Corundum, aluminum oxide (Al₂O₃); likely lab-grown or treated material

Likely galena (lead ore)

Galena, PbS (lead sulfide)

Silver (Native Element)

Ag (Argentum) - 90% Silver, 10% Copper alloy in specimen

Copper (native copper)

Native copper, Cu

Copper-bearing rock, likely native copper in a weathered matrix

Native copper (Cu), tentatively with copper sulfide/oxide minerals

Galena-bearing sulfide ore

Galena (lead sulfide, PbS), possibly with sphalerite and/or pyrite

Iridium sand or Osmium-Iridium nugget

Iridosmine / Osmiridium (Platinoid grouping)

Native copper-bearing rock (probable copper ore)

Native copper (Cu), likely with copper sulfide/oxide minerals in a host rock

Gold Ore (in Quartz/Gossan matrix)

Native Gold (Au) in Limonite/Quartz matrix

Likely raw galena fragment

Galena (lead sulfide, PbS), possibly with metallic sulfide matrix

Metallic sulfide mineral specimen, likely pyrite-bearing ore

Likely pyrite (FeS₂), possibly mixed with other sulfides or host rock

Iridescent bismuth crystal

Bismuth (Bi), commonly laboratory-grown and oxidized

Iron-rich vesicular rock, possibly slag or weathered basalt

Identification uncertain; likely ferruginous basalt/ironstone, with possible anthropogenic iron slag

Galena

Galena (lead sulfide, PbS), likely with associated sulfide minerals

Aquamarine

Beryl (Be3Al2Si6O18 with iron impurities)

Metallic iron meteorite (probable)

Iron meteorite, typically kamacite–taenite (Fe–Ni alloy)

Lepidolite

K(Li,Al)3(Si,Al)4O10(F,OH)2

Galena

Galena (lead sulfide, PbS)

Likely galena

Galena (lead sulfide, PbS)

Galena

Galena (lead sulfide, PbS)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Native Gold

Gold (Au)

US Penny

Cuprum (Copper: Cu) and Zincum (Zinc: Zn) Alloy

Galena-bearing sulfide fragment

Galena (PbS), possibly with quartz or carbonate gangue

Raw metallic sulfide specimen, likely galena

Galena (lead sulfide, PbS), possibly mixed with sphalerite or chalcopyrite