Mineral (Processed Metal)

Tumbled or broken translucent quartz-like fragment

Quartz (silicon dioxide, SiO₂), possibly chalcedony or calcite

White jade-like beaded bracelet

Unverified; possibly milky quartz or white jade (nephrite jade or jadeite)

Orbicular jasper (likely ocean jasper)

Silica-rich jasper, predominantly microcrystalline quartz (SiO₂), with iron-oxide and volcanic/mineral inclusions

Tumbled carnelian (likely)

Chalcedony, microcrystalline quartz (SiO₂), iron-oxide colored variety

Tumbled blue glassy mineral, possibly sodalite or blue aventurine

Identification uncertain; likely sodalite (Na₈Al₆Si₆O₂₄Cl₂) or blue-dyed quartz/slag-like material

Diamond (in jewelry)

Carbon (C)

Green cabochon gemstone, likely aventurine or jade

Indeterminate from the image; possible green quartzite (aventurine) or jadeite/nephrite

Granite gravel

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

Serpentinite

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

Man-made Jewelry (Metal and Glass/Plastic)

Synthetic Alloy and Amorphous Solid (SiO2/Polymer)

Native Copper with Cuprite and Quartz

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

Quartz with Gold

Silicon Dioxide with Native Gold (SiO2 + Au)

Green cabochon pendant, likely jade

Probably nephrite jade (tremolite–actinolite, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂); visual identification is uncertain

Likely polished agate or jasper

Microcrystalline quartz (SiO₂); exact variety cannot be determined from this photograph

Tumbled hematite

Hematite (Fe₂O₃), likely polished specular hematite

Shale with Quartz Veins

Fissile Sedimentary Rock (SiO2)

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

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Lepidolite

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

Serpentinite

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

Tiger’s eye beads

Tiger’s eye (quartz variety), SiO₂, with pseudomorphic fibrous crocidolite/goethite inclusions

Yellow chalcedony (likely lemon agate or yellow jasper)

Microcrystalline quartz, SiO₂; possibly iron-bearing jasper or chrysoprase-like chalcedony

Rhyolite

Extrusive igneous rock (felsic)

Serpentinite

Serpentinite (composed primarily of mineral group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)

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.)

Fluorite

Calcium Fluoride (CaF2)

Iron Slag

Iron smelting byproduct (Glassy/vesicular silicate)

Tumbled Tiger’s Eye

Quartz variety, fibrous SiO₂ with crocidolite pseudomorphs

Magnetite Sand (Black Sand)

Magnetite (Fe3O4)

Sandstone (with Iron Staining)

Sandstone (mainly Quartz, SiO2, with Iron Oxides like Goethite/Hematite)

Serpentinite

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

Banded Agate Coaster

Silicon Dioxide (SiO2) - Variety Agate / Chalcedony

Green sea glass (likely slag glass or bottle glass)

Man-made soda-lime silicate glass; not a naturally occurring mineral

Black tourmaline (schorl) on quartz matrix

Schorl, NaFe3Al6(BO3)3Si6O18(OH)4, commonly associated with quartz (SiO2)

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂), cryptocrystalline to microcrystalline variety

Green glassy slag or manufactured glass bead

Noncrystalline silicate glass; likely industrial glass/slag, not a true mineral

Greenstone / Serpentinite

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

Chalcopyrite in Matrix

CuFeS2

Small brown mineral/rock fragment

Indeterminate; possibly weathered quartz-rich rock, ironstone, or a sulfide mineral