Mineral (Processed Alloy)

Pink Granite

Phaneritic Plutonic Felsic Igneous Rock (Granite)

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Iron Meteorite

Iron-Nickel Alloy (Kamacite and Taenite)

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

Vanadinite on Barite

Pb5(VO4)3Cl (Vanadinite) with BaSO4 (Barite)

Granite (with Beryl/Aquamarine)

Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)

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)

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

Tumbled quartz (likely milky/rose quartz)

Quartz, silicon dioxide (SiO₂)

Dyed mineral cluster, likely calcite or aragonite

Calcite (CaCO₃) or aragonite (CaCO₃), artificially color-enhanced

Likely tumbled jasper or iron-rich chert

Microcrystalline quartz (SiO₂), potentially hematite/goethite-bearing

Tumbled carnelian (likely)

Cryptocrystalline chalcedony, SiO₂; orange-red variety commonly called carnelian

Granite

Granitoid (dominated by Quartz and Feldspar)

Iridescent chalcopyrite (“peacock ore”)

Chalcopyrite, CuFeS₂, commonly surface-oxidized to covellite and related copper sulfides

Beryl (Emerald Variety)

Beryllium aluminum silicate (Be3Al2(SiO3)6) with chromium/vanadium traces

Aquamarine

Beryl (Be3Al2Si6O18 with iron traces)

Silver (Native Element)

Ag (Native Silver), with minor Copper (Cu)

Tumbled pale-yellow chalcedony (possibly yellow jasper)

Microcrystalline quartz, SiO₂; chalcedony/jasper varieties

Dyed Blue Agate

Chalcedony (Silicon Dioxide / SiO2)

Sandstone (Ferruginous Concretion)

Ferruginous Sandstone Concretion / SiO2 with Fe2O3 cement

Granite

Phaneritic Plutonic Felsic Rock

Gold-bearing Quartz Vein in Mafic Rock

Hydrothermal Quartz Vein within Greenschist/Amphibolite facies (SiO2 with Au)

Black tumbled stone, likely obsidian

Volcanic glass; chiefly amorphous SiO₂

Beryl (var. Aquamarine/Blue Beryl) in Quartz Matrix

Beryllium Aluminum Silicate (Be3Al2Si6O18)

Native Copper (Tumbled Nugget)

Cu (Native Element)

Aquamarine

Beryllium aluminum silicate (Be3Al2Si6O18)

Arsenopyrite

Arsenopyrite (FeAsS)

Celestine (Celestite)

Strontium sulfate (SrSO4)

Clear quartz (likely quartz crystal fragment)

Quartz, silicon dioxide (SiO₂)

Iron-rich breccia or weathered ironstone

Goethite–hematite-bearing ferruginous rock, possibly limonite

Green sea glass (likely bottle glass)

Human-processed soda–lime silicate glass; not a natural mineral or rock

Polished garnet beads

Garnet group, commonly almandine–pyrope solid solution (approximately Fe₃Al₂(SiO₄)₃–Mg₃Al₂(SiO₄)₃)

Rose quartz (likely)

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

Selenite (satin spar gypsum)

Gypsum, CaSO₄·2H₂O; fibrous variety known as satin spar

Granite

Phaneritic Felsic Igneous Rock