Mineral (Processed Metal)

Gabbro (likely with Pyrite/Sulfide mineralization)

Mafic Intrusive Igneous Rock

Green Glass Slag

Amorphous Silicon Dioxide (SiO2) with metal oxide impurities

Dendritic Agate

Silicon Dioxide (Chalcedony with manganese or iron oxide inclusions)

Faceted clear gemstone in a metal setting

Unidentified transparent faceted gem; possibilities include quartz (SiO₂), topaz (Al₂SiO₄(F,OH)₂), or glass—the image is insufficient for identification.

Quartzite (Milky)

Quartzite (SiO2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Granite

Intrusive Igneous Rock

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

Red-orange sunstone (likely aventurine feldspar) bead bracelet

Feldspar, commonly oligoclase or labradorite with copper inclusions; composition varies by source

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

Aura Quartz Bead

Silicon dioxide (SiO2) with metal coating

Likely chrysocolla-bearing copper ore

Chrysocolla, a hydrated copper silicate; exact identification is uncertain from the small, blurry image

Mixed mineral and rock specimen collection

Assorted silicates, carbonates, oxides, and sulfides; individual species cannot be reliably identified from this image

Pyrite with Quartz

Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)

Granite

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

Polished carnelian agate pendant

Microcrystalline quartz (SiO₂), orange chalcedony; likely banded agate

Asphalt aggregate

Human-made bituminous asphalt containing crushed silicate rock aggregate

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Granite

Intrusive Igneous Rock

Meteorite

Chondrite or Achondrite stony-iron meteorite

Lapis lazuli bead bracelet

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

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

Granite

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

Celestine Geode

Strontium Sulfate (SrSO4)

Granite

Intrusive Igneous Rock

Uncertain small metallic-looking mineral/rock fragment

Indeterminate; possibly galena-bearing rock or metallic slag

Unidentified dark metallic sulfide specimen

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

Granite

Intrusive Igneous Rock

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

Granite

Intrusive Igneous Rock (Felsic)

Likely industrial slag or weathered basalt

Basaltic rock; possibly iron-rich furnace slag (diagnosis uncertain from image)

Gold Nugget

Native Gold (Au)

Asphalt aggregate pavement

Bituminous asphalt concrete containing crushed stone aggregate

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