Man Made Material (Metal)

Tumbled cream-colored pebble

Likely quartz-rich sandstone or limestone; exact identification requires testing

Faceted clear gemstone in a gold-colored ring

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

Gemstone-set silver jewelry piece

Likely mixed faceted gemstones in a silver-colored metal setting; stones may include sapphire, ruby/garnet, and yellow sapphire or citrine, but the image is insufficient for species-level identification.

Diamond ring (likely clear cut gemstone)

Diamond, crystalline carbon (C)

Carved translucent jade pendant

Likely nephrite jade (actinolite–tremolite series); possibly jadeite or chalcedony, identification requires testing

Chert / Flint

Silicon Dioxide (SiO2)

Slate

Metamorphic Pelitic Rock

Slate

Metamorphic Pelitic Rock

Chert (Chalcedony/Agate variety)

Silicon Dioxide (SiO2)

Iron-stained brecciated quartz vein rock

Quartz-rich hydrothermal breccia; predominantly SiO₂ with iron oxides/hydroxides (hematite, goethite) and likely minor host-rock minerals

Turquoise inlay or stabilized turquoise jewelry fragment

Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Granite Boulder

Felsic Intrusive Igneous Rock

Likely metallic meteorite fragment

Unclassified iron-rich meteorite; possible stony-iron or iron meteorite

Nephrite Jade

Nephrite

Amethyst cabochon ring

Amethyst, purple quartz (SiO₂), colored primarily by iron-related defects and irradiation

Serpentinite

Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4

Diamond

Diamond (pure Carbon, C)

Weathered quartz-bearing rock, possibly iron-stained quartzite or granitic pegmatite

Indeterminate; likely quartz-rich silicate rock with iron-oxide staining (SiO₂-dominant)

Iron-stained quartz vein in weathered host rock

Quartz (SiO₂) with iron-oxide/hydroxide staining; host rock undetermined

Likely polished dark gemstone cabochon

Indeterminate; possibly black chalcedony/agate, obsidian, or glass imitation

Likely black cabochon gemstone pendant

Uncertain; possibly black star sapphire, black spinel, or obsidian

Chert (flint)

Microcrystalline quartz, SiO₂ (chalcedony/quartz)

Clay Brick

Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)

Iron Meteorite / Chondrite (Possible)

Extraterrestrial stony-iron or chondritic meteorite

Turquoise cabochon

Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Red jasper cabochon pendant

Jasper—opaque microcrystalline quartz/chalcedony, primarily SiO₂, colored red by iron oxides

Diamond (set in jewelry)

Diamond (Carbon, C)

Gemstone ring with dark blue cabochons

Likely blue sapphire (corundum, Al₂O₃); the stones cannot be identified confidently from the image

Copper Ore with Malachite and Chalcocite

Copper-bearing Mineral Assemblage (Cu2CO3(OH)2 + Cu2S)

Milky Quartz

Silicon Dioxide (SiO2)

Amber cabochon ring (likely amber)

Amber — fossilized plant resin; organic mineraloid, not a crystalline mineral

Turquoise cabochon ring

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O

Man-made Green Quartz (Lab-grown or Treated)

Silicon Dioxide (SiO2) with artificial coloration

Blue chalcedony crystal pendant

Chalcedony, microcrystalline quartz (SiO₂), likely blue chalcedony or dyed quartz

Iron-stained quartz-bearing rock

Quartz (SiO₂), likely in a limonite/goethite-rich matrix

Iron-rich meteorite candidate (weathered iron meteorite)

Likely Fe–Ni metal, commonly kamacite and taenite; definitive identification requires laboratory testing

Quartzite

Quartzite (primarily SiO2)

Quartz Vein in Host Rock

Silicon dioxide (SiO2) veins in metamorphic/igneous host rock

Diamond (Cut jewelry specimen)

Diamond (pure Carbon, C)

Hematite (hematite beads or tiles)

Hematite, α‑Fe₂O₃

Possible basaltic rock or meteorite candidate

Likely vesicular basalt; meteorite identification cannot be confirmed visually

Iron Slag

Ferrous Slag (Industrial Byproduct)