Mineral (Processed Metal)

Polished agate (likely moss or plume agate)

Microcrystalline quartz (SiO₂), chalcedony variety; exact variety is uncertain from the photo

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Milky quartz fragment

Quartz, silicon dioxide (SiO₂)

Likely tumbled pale-green mineral specimen

Indeterminate; possibly serpentine, calcite, or pale jade/nephrite

Green glass-like cabochon, likely synthetic glass or resin

Unidentified green transparent material; possibly molded glass, synthetic spinel, or resin

Granite

Felsic intrusive igneous rock

Tumbled green-yellow chalcedony (likely prehnite or serpentine)

Cryptocrystalline quartz (chalcedony), SiO₂; identification is uncertain from the photograph

Beaded stone necklace, likely yellow agate or chalcedony

Chalcedony (microcrystalline quartz, SiO₂); exact stone cannot be confirmed from the photo

Green aventurine bead bracelet

Quartz (SiO₂), likely fuchsite-bearing aventurine

Emerald and Diamond Ring

Beryl (Be3Al2(SiO3)6) and Carbon (C)

Copper Ore with Chalcocite

Copper sulfide (Cu2S) with associated copper-bearing minerals

Chalcopyrite (or Pyrite Ore)

CuFeS2 (Copper Iron Sulfide)

Tumbled pale chalcedony (likely quartz)

Microcrystalline quartz, SiO₂; possibly pale agate or quartz

Carved shell pendant or charm

Likely nacre (mother-of-pearl), composed chiefly of aragonite (CaCO₃) in an organic matrix

Titanium Amethyst Geode

Silicon Dioxide (SiO2) with Titanium/Metal Vapor Deposition Layer

Biotite Granite

Phaneritic Felsic Igneous Rock

Cubic Zirconia (Simulated Diamond)

Zirconium Dioxide (ZrO2)

Quartz Vein in Greenstone

SiO2 hosted in metamorphosed basalt

Industrial slag (iron/copper smelting slag)

Multiphase vitreous metallurgical slag; commonly iron-silicate glass with metal-oxide and metallic inclusions

Unidentified metallic mineral or metal-like specimen

Indeterminate from image; possibly galena (PbS) or a metallic sulfide

Faceted clear gemstone in a gold-colored ring

Unidentified colorless faceted gem; possibly quartz, glass, or another transparent gem material

Inlaid stone ring (likely jasper or agate)

Likely microcrystalline quartz (chalcedony, SiO₂), possibly jasper, with decorative mineral inlays

Ironstone concretion

Siderite or Limonite-rich Concretion (FeO(OH)·nH2O)

Orgonite Pyramid (containing Amethyst and mixed minerals)

Silicon Dioxide (SiO2) in synthetic resin

Vanadinite

Pb5(VO4)3Cl

Lepidolite

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

Pyrite

Iron Disulfide (FeS2)

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Gold Nugget

Native Gold (Au)

Granite

Intrusive Igneous Rock

Lepidolite

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

Aqua Aura Quartz

Titanium/Gold-coated Silicon Dioxide (SiO2)

Polished ocean jasper / orbicular jasper

Microcrystalline quartz (SiO₂), commonly with chalcedony, feldspar, and iron/manganese oxides

Slag Glass

Glassy Silicate Residue

Quartz Sand (Beach Sand)

Silicon Dioxide (SiO2)

Chrysocolla-bearing copper ore

Primarily chrysocolla, a hydrated copper silicate (approx. Cu₂−xAlx(H₂−xSi₂O₅)(OH)₄·nH₂O); exact identification is uncertain from the image.

Quartz Pebble

Silicon Dioxide (SiO2)

Red garnet-like faceted pendant

Possibly almandine garnet, Fe₃Al₂(SiO₄)₃; identification is uncertain from the image

Mixed rock and mineral collection

Multiple specimens; visible pieces may include quartz, calcite, agate/chalcedony, jasper, and dyed or coated materials

Obsidian (likely black volcanic glass)

Obsidian; primarily amorphous volcanic silica glass, approximately SiO₂-rich rhyolitic composition

Polished dendritic agate or jasper

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide inclusions

Opalite

Synthetic Opalized Glass / Man-made Glass