Mineral (Native Element Alloy)

Quartz-rich pegmatite (possibly tourmaline-bearing)

Granitic pegmatite; chiefly quartz (SiO₂), feldspar, and dark mica/amphibole

Native metallic specimen, possibly galena or a sulfide-rich ore fragment

Tentatively galena (lead sulfide, PbS), possibly mixed with iron/copper sulfides

Iron-Nickel Meteorite Fragment (Unclassified)

Iron-Nickel Alloy (Taenite and Kamacite)

Iron-Nickel Meteorite

Siderite (Meteoric Iron-Nickel alloy)

Iron Meteorite

Siderite (Meteoric Iron-Nickel alloy)

Iron Meteorite

Iron-nickel alloy (primarily kamacite and taenite)

Tumbled turquoise

Turquoise, CuAl6(PO4)4(OH)8·4H2O

Turquoise (likely stabilized or Howlite/Magnesite imitation)

Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O

Native gold nugget (probable)

Native gold, Au; possibly gold-bearing ironstone or quartz matrix

Copper ore with native copper and quartz/calcite

Malachite–chrysocolla–cuprite-bearing copper ore, likely with quartz or calcite gangue

Gold-bearing sulfide ore (tentative)

Native gold, likely with pyrite/chalcopyrite in quartz or altered rock

Amygdaloidal Basalt

Vesicular-Amygdaloidal Basalt (Mafic Extrusive)

Goldstone (likely blue-free synthetic goldstone pendant)

Synthetic aventurine glass; silica glass with dispersed metallic copper crystals

Diamond

Carbon (C)

Diamond

Carbon (C)

Man-made Blank Ammunition (Brass)

CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)

Turquoise

Hydrated phosphate of copper and aluminum; CuAl6(PO4)4(OH)8·4H2O

Spiny Oyster Shell

Spondylus varians (Biogenic Calcium Carbonate)

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

Zinc Alloy (Silver-plated)

Zinc Alloy Casting (Zn-Al-Mg-Cu)

Pyrite-rich sulfide ore (likely pyrite with chalcopyrite)

Pyrite, FeS₂; possible chalcopyrite, CuFeS₂, and minor quartz or sphalerite

Likely hematite-rich ironstone or metallic mineral fragment

Hematite (Fe₂O₃), possibly with magnetite (Fe₃O₄) or metallic iron

Malachite-bearing copper ore

Malachite, Cu₂CO₃(OH)₂, likely mixed with chrysocolla, copper minerals, and iron oxides

Agate (Thunderegg)

Silicon dioxide (SiO2)

Turquoise

Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O

Iron Meteorite (Oxidized)

Iron-Nickel Alloy (Fe, Ni)

Iron Meteorite

Iron-Nickel Alloy (Kamacite and Taenite)

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Amygdaloidal Basalt

Vesicular Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)

Iron Meteorite (Candidate)

Iron Meteorite (Siderite)

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Native gold-bearing quartz/rock specimen

Native gold (Au) in quartz and iron-oxide matrix

Amygdaloidal Basalt

Amygdaloidal Basalt (with secondary mineral infilling)

Iron meteorite (probable)

Iron–nickel meteorite, mainly kamacite and taenite (Fe–Ni alloy)

Pyrite-bearing quartz vein (likely pyrite ore)

Pyrite, FeS₂, with abundant quartz (SiO₂) and possibly chalcopyrite

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

Likely galena (lead ore)

Galena, PbS (lead sulfide)

Copper-bearing sulfide ore, possibly chalcopyrite-rich

Chalcopyrite (CuFeS₂), possibly with bornite and oxidation products

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

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