Mineral (Metal)

Granite

Felsic intrusive igneous rock

Slag

Anthropogenic Vitrification Product / Silicate Slag

Granite

Granite (felsic intrusive igneous rock)

Granite

Felsic intrusive igneous rock

Polished dendritic agate pendant

Microcrystalline quartz (SiO₂), with dark manganese- or iron-oxide dendrites

Iron Slag

Anthropogenic Vitreous Ferrous Silicate

Opal stud earrings

Opal, hydrated amorphous silica (SiO₂·nH₂O)

Gemstone-set ring, likely cubic zirconia or diamond

Likely synthetic cubic zirconia (zirconium dioxide, ZrO₂); stones may alternatively be diamond (carbon, C)

Granite

Intrusive Igneous Rock

Feldspar-Quartz Rock (likely Pegmatite or Granite)

Feldspar-Quartz composite rock (KAlSi3O8 - SiO2)

Quartz-bearing Ore (likely Gold-bearing Quartz)

Quartz (SiO2) with potential sulfide mineralization (Pyrite/Arsenopyrite)

Granite

Felsic intrusive igneous rock

Granite

Intrusive igneous rock primarily composed of quartz, alkali feldspar, and plagioclase

Green faceted gemstone earrings, likely synthetic emerald-colored glass or cubic zirconia

Undetermined; possible glass (amorphous silicate) or synthetic cubic zirconia (ZrO₂)

Blue-green crystal point, likely fluorite

Fluorite (CaF₂), tentative visual identification

Cubic Zirconia (Jewelry Setting)

Zirconium Dioxide (ZrO2)

Granite

Felsic intrusive igneous rock

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Cabochon gemstone ring, likely smoky quartz or tourmaline

Unconfirmed quartz (SiO₂) or brown tourmaline (dravite); visual identification is inconclusive

Small metallic mineral fragment

Unidentified metallic sulfide or native-metal fragment

Mixed gemstone jewelry collection

Likely amethyst, rose quartz or pink tourmaline, smoky quartz, and dark tourmaline/onyx; exact identifications are uncertain from the image

Sunstone

Oligoclase (Plagioclase Feldspar), (Ca,Na)(Al,Si)4O8

Amethyst (in jewelry)

Silicon Dioxide (SiO2) with iron impurities

Likely weathered copper-bearing rock

Indeterminate from the photo; possibly malachite-bearing rock (Cu₂CO₃(OH)₂)

Copper Ore

Mixed copper sulfides/oxides in gangue matrix

Lepidolite

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

Galena

Lead(II) sulfide (PbS)

Cobalt Blue Glass / Cullet Glass

Silicon dioxide (Amorphous man-made glass)

Silver Nugget

Native Silver (Ag)

Gold Nugget

Native Gold (Au)

Faceted orange gemstone stud (possibly citrine)

Unconfirmed; possibly quartz (SiO₂), variety citrine

Polished orange chalcedony pendant

Chalcedony, microcrystalline quartz (SiO₂), likely orange carnelian or orange agate

Mineral Sand (Heavy Mineral Sand Concentrate)

Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite

Merlinite (dendritic opal)

Common opal (hydrated amorphous silica, SiO₂·nH₂O) with dark manganese-oxide dendrites; the trade name “merlinite” is also applied to other patterned stones.

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Biotite-bearing metamorphic rock, likely gneiss or schist

Mica-rich quartz–feldspar gneiss/schist; exact identification requires testing

Quartz and Limestone Grouping

Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)

Iron-stained quartz vein in altered host rock

Quartz (SiO₂) with iron oxides/hydroxides, likely hematite and goethite; host rock uncertain from the image

Lepidolite with Rubellite Tourmaline

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

Iron-rich meteorite fragment (probable)

Unclassified meteoritic iron–nickel or stony-iron fragment

Quartz (River Pebble)

Silicon Dioxide (SiO2)