Mineral (Processed Metal)

Quartzite

Metamorphosed Sandstone (SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron

Uncertain small metallic-looking mineral/rock fragment

Indeterminate; possibly galena-bearing rock or metallic slag

Granite

Plutonic Igneous Rock

Granite

Intrusive Igneous Rock

Quartz Vein in Basalt or Sedimentary Host Rock

Silica-veined lithic fragment (SiO2 in host matrix)

Milky Quartz with Mica Matrix

SiO2 (Silicon Dioxide) with Muscovite/Biotite mica

Red jasper (likely polished and carved)

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Aura Quartz (Coated Quartz)

Silicon Dioxide (SiO2) treated with metallic vapor

Polished blue stone, likely sodalite or dyed quartz

Possibly sodalite (Na₈Al₆Si₆O₂₄Cl₂) or artificially dyed quartz/chalcedony; image alone is inconclusive

Asphalt aggregate

Human-made bituminous asphalt containing crushed silicate rock aggregate

Green Glass Cullet / Recycled Glass

Amorphous Silicon Dioxide (SiO2) with various metal oxides

Quartzite (Milky)

Quartzite (SiO2)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Tumbled amethyst

Quartz, SiO₂; purple coloration from iron-related defects and irradiation

Black tourmaline beads (likely schorl)

Schorl, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Tumbled and polished quartz crystal points

Quartz (silicon dioxide, SiO₂), chiefly rock crystal with smoky or included varieties

Granite

Intrusive Igneous Rock

Lapis lazuli bead bracelet

Lazurite-bearing calcite–pyrite rock; lazurite formula (Na,Ca)₈(AlSiO₄)₆(S,SO)₂

Unidentified dark metallic sulfide specimen

Possibly pyrite-, chalcopyrite-, or galena-bearing ore; exact identification requires testing

Granite

Felsic intrusive igneous rock

Granite

Felsic intrusive igneous rock

Granite

Granite (interlocking crystals of quartz, feldspar, and mica)

Likely polished greenstone or serpentine inlay

Serpentine-group mineral, commonly antigorite/lizardite; possibly nephrite jade

Gabbro (likely with Pyrite/Sulfide mineralization)

Mafic Intrusive Igneous Rock

Asphalt aggregate pavement

Bituminous asphalt concrete containing crushed stone aggregate

Granite

Intrusive Igneous Rock

Polished banded calcite (often sold as “onyx marble” or Mexican onyx)

Banded calcite; predominantly CaCO₃, usually microcrystalline to fibrous calcite

Carved quartz (likely rose quartz and green aventurine/quartz)

Quartz, silicon dioxide (SiO₂); green material may be aventurine quartz or serpentine

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

Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)

Granite

Intrusive Igneous Rock (Felsic)

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

Diamond (Cluster Ring)

Carbon (C)

Aura Quartz Bead

Silicon dioxide (SiO2) with metal coating

White quartz bead strand (likely milky quartz)

Quartz, silicon dioxide (SiO₂), crystalline silica

Green tourmaline (likely chrome/dravite tourmaline crystals)

Tourmaline-group cyclosilicate; commonly elbaite, dravite, or chromdravite, complex borosilicate formula