Mineral (Man Made Composite)

Nickel coin (U.S. currency)

Cupronickel (75% Copper, 25% Nickel alloy)

Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)

Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy

Polished turquoise (likely stabilized)

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

Fossil crocodilian skull and jaws

Crocodyliform fossil; exact genus and species cannot be determined from the image

Polished blue calcite sphere (tentative identification)

Calcite, CaCO₃; blue color generally results from trace impurities or inclusions

Agate (Dyed) or composite stone

SiO2

Diamond (or Diamond Simulant)

Carbon (C)

Pearl

Nacre (aragonite, CaCO₃, with conchiolin)

Wood Paneling

Engineered Wood / Plywood Paneling

Turquoise cabochon

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; likely stabilized or matrix-bearing

Decorative orb of likely sodalite-bearing rock or dyed stone

Most consistent with sodalite-rich nepheline syenite or a blue-and-white composite; exact identification requires testing

Turquoise cabochon jewelry

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

Diamond (in a gold ring)

Diamond (pure carbon, C)

Diamond (in jewelry setting)

Diamond (C - Carbon)

Opal ring (likely precious opal)

Hydrated amorphous silica, SiO₂·nH₂O; the pictured stone may be natural opal or a lab-created/imitation opal

Graphite

Graphite (elemental carbon, C)

Tumbled aqua glassy mineral specimen, likely chrysocolla or turquoise imitation

Uncertain from image; possible chrysocolla (hydrated copper aluminosilicate, variable composition) or dyed/man-made glass

Granodiorite

Granodiorite

Moon (lunar surface depiction)

Lunar rock; chiefly anorthosite, basalt, and breccia (plagioclase-rich CaAl2Si2O8)

Unakite

Unakite Epidosite (composite of Epidote, Orthoclase, and Quartz)

Polished/tumbled stone, likely serpentine or agate

Probable serpentine-group mineral (antigorite/lizardite), possibly a green jasper or agate; image is insufficient for certainty

Turquoise (likely stabilized or composite)

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

Chrysocolla in Jasper / Green Jasper

Cu2-xAlx(H2-x)Si2O5(OH)4·nH2O in SiO2 matrix

Red glassy cabochon, likely synthetic ruby or red glass

Uncertain; possible synthetic corundum (Al₂O₃, chromium-colored) or man-made glass

Oak-grain Laminate (Industrial/Decorative Furniture Finish)

Melamine Resin-impregnated Decorative Paper on Particleboard (Cellulose/Thermosetting Plastic)

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Polished serpentine-rich stone (likely serpentine jasper or “rainforest jasper”)

Serpentine-group minerals, chiefly antigorite/lizardite, with iron oxides and silica-rich rock matrix

Carved Stone Turtle

Carved Soapstone and Quartz

Cultured pearls

Pearl; predominantly aragonite (CaCO₃) in nacre with organic conchiolin

Diamond (in a jewelry setting)

Diamond (Carbon, C)

Diamond (or Cubic Zirconia simulant)

Carbon (C) - Diamond / Zirconium dioxide (ZrO2) - CZ

Titanium Aura Quartz (Aura Quartz)

Titanium-coated Silicon Dioxide (SiO2)

Ruby in Fuchsite (Composite/Stabilized)

Corundum (Al2O3) in Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Turquoise ring stone (likely stabilized or dyed turquoise)

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

Polished black stone, likely black tourmaline or black obsidian

Most consistent with schorl tourmaline (NaFe3Al6(BO3)3Si6O18(OH)4), though black obsidian (volcanic glass) is also possible

Tumbled quartz-rich stone, possibly milky quartz or quartzite

Quartz (SiO₂), potentially quartzite if metamorphic

Blue-green copper mineral specimen, likely chrysocolla-bearing rock

Chrysocolla, hydrated copper silicate: approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O; possibly mixed with quartz or turquoise

Quartz-rich gravel fragment

Quartz (silicon dioxide, SiO₂), possibly with feldspar or carbonate inclusions

Unakite

Altered granite (Epidote, Orthoclase Feldspar, and Quartz)

Unakite

Epidotized Granite

Fired Clay Brick (Anthropic Rock substitute)

Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)

Polished turquoise-bearing rock

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O, likely in a brown host rock or matrix