Man Made Material (Jewelry, Metal Alloy)

Green Glass (often marketed as 'Obsidian' or 'Green Quartz')

Amorphous Silica (SiO2) with copper or chromium additives

Native Copper

Native Copper (Cu)

Sunstone

Andesine-Labradorite Feldspar ((Ca,Na)(Al,Si)4O8)

Black Obsidian

Amorphous volcanic glass (SiO2 + impurities)

Possible iron meteorite fragment

Iron–nickel meteorite, likely kamacite–taenite alloy

Iron meteorite (likely an etched or weathered display specimen)

Iron meteorite, composed chiefly of kamacite and taenite (Fe–Ni alloys)

Native Copper (in coinage alloy)

Copper (Cu)

Silicon

Crystalline Silicon (Si)

Iron meteorite fragment (likely metallic meteorite)

Fe–Ni kamacite/taenite alloy; exact identification requires testing

Titanium Coated Aura Quartz (Apple Aura Quartz)

Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating

Rock crystal (clear quartz), possibly cloudy quartz

Quartz, silicon dioxide (SiO₂)

Tumbled white chalcedony (likely milky quartz)

Chalcedony, microcrystalline quartz (SiO₂)

Green sea glass (likely bottle glass)

Man-made soda-lime silicate glass; not a natural mineral

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Polished silver sheen obsidian heart

Obsidian (volcanic glass), primarily rhyolitic silica-rich glass

Clear faceted gemstone in a metal jewelry setting (likely imitation glass or cubic zirconia)

Unidentified transparent faceted stone; possibly cubic zirconia (ZrO₂) or glass

Man-made Ceramic / Clay Figurine

Aluminosilicate Ceramic (Processed Clay)

Opalite

Synthetic Glass, SiO2 base with metallic inclusions

Orange cabochon ring

Possibly carnelian (microcrystalline quartz, SiO₂); identification from the photograph is uncertain.

Iron meteorite (probable)

Fe–Ni metallic meteorite, commonly kamacite–taenite

Vanadinite

Pb5(VO4)3Cl

Green sea glass or tumbled green quartz (uncertain)

Likely quartz (SiO₂) if natural; alternatively man-made soda-lime glass

Red Slag Glass

Amorphous Silica (Industrial byproduct with metallic oxide dopants)

Iron-rich meteorite fragment (probable)

Unclassified meteoritic iron–nickel or stony-iron fragment

Opalite

Synthetic Opalised Glass

Bismuth crystal aggregate

Bismuth (Bi), commonly laboratory-grown

Concretion

Sedimentary Concretion (Ironstone / Calcite Concretion)

Conglomerate

Clastic Sedimentary Rock (Conglomerate)

Sandstone (with Liesegang rings or joints)

Clastic Sedimentary Rock (primarily Quartz with Iron Oxide cement)

Sandstone Concretion

Sedimentary Clastic Rock (Silicate-rich)

Sandstone Concretion

Clastic Sedimentary Concretion (typically Quartz/Silica with Iron Oxide)

Weathered iron-rich concretion or ironstone nodule

Goethite–hematite limonite concretion (FeO(OH), Fe₂O₃, and hydrated iron oxides)

Hematite

Iron(III) oxide (Fe2O3)

Blue Goldstone

Aventurine Glass (Silicon Dioxide with metal inclusions)

Dyed Blue Agate (Dragon Vein Agate)

Silicon Dioxide (SiO2) with artificial cobalt/organic dyes

Sea Glass (Frosted Glass)

Amorphous Silica (SiO2) with various metal oxide impurities

Likely iron meteorite (stony-iron or weathered iron-rich meteorite)

Provisional identification: meteoritic Fe–Ni alloy, mainly kamacite/taenite; exact classification requires chemical and petrographic testing

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.

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Cupronickel Coin

Copper-Nickel Alloy (typically 75% Cu, 25% Ni)

Turquoise ring

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; the setting appears to be silver-colored metal

Polished green-and-black banded cabochon (likely malachite imitation or dyed agate)

Uncertain; possible malachite (Cu₂CO₃(OH)₂), banded agate (SiO₂), or man-made glass