Synthetic (Not A Rock Or Mineral)

Weathered, iron-stained metamorphic rock (likely gneiss or schist)

Uncertain from the photograph; possibly quartz–feldspar–mica gneiss or schist

Pearl strand

Nacreous pearl, primarily aragonite (CaCO₃) with conchiolin protein

Weathered dark mineral/rock fragment

Indeterminate; possibly iron-rich basalt, slag, or a sulfide-bearing mineral

Turquoise cabochon pendant

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

Pink Dyed Agate

Silicon Dioxide (SiO2) with synthetic pigment

Blue-and-white opalite sphere

Opalite (commercial synthetic or glass-based imitation; not true opal), typically silica glass or synthetic opalescent material

Opalite

Man-made Glass (Synthetic Opalized Glass)

Unknown dark mineral fragment

Indeterminate; possibly a dark silicate mineral or slag-like geological fragment

Small stud earring with a purple gemstone (possibly amethyst)

Possible amethyst, a purple variety of quartz (SiO₂); identification is uncertain from the image

Painted Rock

Rock coated with synthetic acrylic paint

Silicon Carbide (Carborundum)

Silicon Carbide (SiC)

Blue stone cabochon, likely lapis lazuli or dyed stone

Lapis lazuli: lazurite-rich rock, chiefly (Na,Ca)₈(AlSiO₄)₆(S,SO)₂; exact identification is uncertain from the image

Blue glass-like bead or gemstone keychain ornament

Indeterminate; likely cobalt-blue glass or synthetic blue spinel, not identifiable as a natural mineral from the image

Fossilized stromatolite or laminated microbial mat

Layered carbonate/chert fossil; exact taxon indeterminate from the image

Asphalt (Bituminous Concrete)

Bituminous mix / Anthropogenic conglomerate

Granite (Leucogranite)

Felsic Plutonic Rock (Granite)

Dyed Agate

Silicon Dioxide (SiO2) with synthetic dyes

Digital Multimeter (Synthetic Object)

Digital Multimeter (DMM)

Unidentified polished multicolored stone, possibly granite or mixed-mineral rock

Indeterminate from the photograph; no diagnostic mineral texture or composition is clear

Painted River Rock

Artificially Coated Sedimentary Rock

Likely mica-rich metamorphic rock (schist)

Mica schist, probably containing muscovite and/or biotite with quartz and feldspar

Weathered granite boulder

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

Faceted colorless gemstone, likely quartz (rock crystal)

Quartz, SiO₂

Painted River Rock

Painted Quartzite or Smooth Siltstone

Unidentified coarse-grained rock fragment, possibly granite

Possible granite: quartz, feldspar, and dark mica or amphibole; identification is uncertain from the image

Fossilized gastropod shell

Gastropoda indet.; shell originally composed mainly of aragonite (CaCO₃)

Ruby (in costume jewelry context)

Corundum (Al2O3) with Chromium impurities

Beach Pebble Quartzite / Chalcedony Pebble

Silicon Dioxide (SiO2)

Tumbled granite pebble

Granite, a quartz–feldspar plutonic rock

Opalite

Synthetic Opalised Glass

Hematite bead strand

Hematite, α-Fe₂O₃ (iron(III) oxide)

Opalite (Synthetic Moonstone/Sea Opal)

Silicon Dioxide (SiO2) glass with metallic inclusions

Plastic Building Toy (Lego-style piece)

Acrylonitrile Butadiene Styrene (ABS)

Faceted Clear Quartz or Diamond Simulant

Silicon Dioxide (SiO2) if Quartz or Cubic Zirconia (ZrO2) if Synthetic

Dyed Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Blue Agate Geode (Dyed)

Cryptocrystalline Quartz (SiO2)

Asphalt / Road Aggregate

Bituminous Conglomerate (synthetic)

Blue-violet faceted gemstone, likely amethyst

Quartz (SiO₂), purple variety colored mainly by iron impurities and irradiation

Synthetic Wolf Plush (Non-mineral)

Canis lupus similis (Prop material: Polyester & Synthetic fibers)

Tumbled granite

Granite, a coarse-grained felsic intrusive igneous rock

Probable fossil-bearing rock or mineral concretion

Unidentified carbonate-rich concretion with a possible fossil inclusion

Opalite

Synthetic glass / Opaque silicious glass