Mineral (Refined Metal)

Bismuth Crystal

Bismuth (Bi)

Man-made Jewelry Charm (Enameled Metal)

Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.

Yellow Beryl

Beryl (Be3Al2(SiO3)6)

Vein Quartz in Host Rock

Silicon Dioxide (SiO2) vein in sedimentary/metamorphic matrix

Lepidolite

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

Native Silver

Silver (Ag)

Lepidolite Granite

Granite with lepidolite (K(Li,Al)3(Si,Al)4O10(F,OH)2)

Copper Ore with Chalcocite

Copper sulfide (Cu2S) with associated copper-bearing minerals

Chalcopyrite (or Pyrite Ore)

CuFeS2 (Copper Iron Sulfide)

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

Orgonite Pyramid (containing Amethyst and mixed minerals)

Silicon Dioxide (SiO2) in synthetic resin

Vanadinite

Pb5(VO4)3Cl

Beaded gemstone bracelet

Indeterminate; likely small polished mineral beads, possibly turquoise or dyed stone, with metal and glass components

Lepidolite

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

Pyrite

Iron Disulfide (FeS2)

Granite

Intrusive Igneous Rock

Lepidolite

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

Lepidolite

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

Opalite

Synthetic Opalized Glass / Man-made Glass

Diamond (in jewelry)

Carbon (C)

Granite gravel

Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica

N/A - Man-made object (Jewelry Chain)

Antiqued or Oxidized Metal Chain (often Steel or Brass)

Native Copper with Cuprite and Quartz

Copper (Cu), Cuprite (Cu2O), Quartz (SiO2)

Silver (Sterling Silver)

Argentum (Ag) mixed with Copper (Cu); Formula: Ag+Cu

Quartz with Gold

Silicon Dioxide with Native Gold (SiO2 + Au)

Slag Glass

Silicon dioxide with impurities

Tumbled hematite

Hematite (Fe₂O₃), likely polished specular hematite

Blue Glass / Slag Glass

Amorphous silicon dioxide (SiO2) with cobalt colorants

Possible iron-rich sulfide ore fragment

Unidentified sulfide, possibly pyrite-rich material (FeS₂); image is insufficient for a firm identification

Rose quartz bead bracelet

Quartz, SiO₂ (rose-colored variety); likely mixed with clear crackle-quartz beads

Gold Ore (Auriferous Quartz with Chalcopyrite/Pyrite)

Au (Native Gold) in Quartz (SiO2) with FeS2 (Pyrite) or CuFeS2 (Chalcopyrite)

Lepidolite

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

Rhyolite

Extrusive igneous rock (felsic)

Quartz-bearing Pegmatite with Metallic Sulfides

Pegmatite / Quartz-Feldspar Matrix with Pyrite and Mica

Quartz Vein in Host Rock (Gneiss/Schist)

Silicon Dioxide (SiO2) within a metamorphic matrix

Mineral Specimen Collection (Galena, Quartz, Calcite, Hematite, etc.)

Mixed Mineral Assemblage (PbS, SiO2, CaCO3, Fe2O3, ZnS, etc.)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in matrix

Fluorite

Calcium Fluoride (CaF2)

Chalcopyrite in Matrix

CuFeS2