Not A Rock (Synthetic

Oak-grain Laminate (Industrial/Decorative Furniture Finish)

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

Portable Ceramic Space Heater

Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements

Synthetic Faux Fur Fursuit

Polyacrylonitrile / Polyester (Synthetic Textile)

Not a rock

Not a rock

Not a rock

Not a rock

Not a rock

Not a rock

Man-made Synthetic Material (Costume Faux Fur)

Synthetic Polymer (Polyester/Acrylic)

Silicon Carbide (Carborundum)

Silicon Carbide, SiC

Faceted Gemstone

Unknown transparent mineral, possibly Diamond (C), Cubic Zirconia (ZrO2), Quartz (SiO2), or Glass

Painted River Rock

Painted Quartzite or Smooth Siltstone

Rock Crystal (Clear Quartz)

Silicon dioxide (SiO2)

Painted Rock

Weathered Sedimentary Rock (Painted)

Opalite

Synthetic Opalised Glass

Faceted Clear Quartz or Diamond Simulant

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

The user-provided image does not contain a rock or mineral specimen

Opalite-style glass pendant

Man-made opalescent glass (not natural opal)

Clear faceted gemstone in an ornate metal bracelet

Unidentified transparent faceted stone; possibilities include quartz (SiO₂), zircon (ZrSiO₄), or glass—image alone cannot distinguish them

Pink granite

Granite, chiefly quartz, potassium feldspar, and plagioclase with minor mica

Dyed Quartzite

Metamorphosed Quartz (SiO2) with synthetic pigment

Opalite

Synthetic Opalite Glass

Sedimentary Rock with Crafts (Pet Rock)

Sedimentary rock decorated with synthetic materials

Note on Image Identification: Textile

N/A (Anthropogenic material)

Blue cabochon gemstone, likely synthetic spinel or glass

Undetermined; possible synthetic cobalt-blue spinel (MgAl₂O₄) or colored glass

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Man-made Synthetic Material (Plastic/Composite)

Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)

Cubic Zirconia (as used in jewelry setting)

Zirconium dioxide (ZrO2)

Asphalt / Road Aggregate

Bituminous Conglomerate (synthetic)

Clear Quartz crystals on a Matrix base (Geode fragment)

Silicon Dioxide (SiO2)

Red faceted gemstone, likely synthetic ruby or red glass imitation

Possibly synthetic corundum (Al₂O₃:Cr³⁺); image alone cannot distinguish it from glass or another imitation

Clear gemstone earring (likely cubic zirconia)

Cubic zirconia (synthetic zirconium dioxide, ZrO₂); identification from the image is uncertain

Faceted purple gemstone, possibly amethyst

Likely quartz (SiO₂), variety amethyst; identification is uncertain from the image

Coal (Bituminous or Anthracite)

Carbonaceous Sedimentary Rock

Small stud earring with a purple gemstone (possibly amethyst)

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

Digital Multimeter (Synthetic Object)

Digital Multimeter (DMM)

Man-made Synthetic Material (Not a rock or mineral)

Polyester (Polyethylene terephthalate) / Faux Fur

Serpentinite

Serpentinite, a rock composed mainly of serpentine-group minerals (approximately Mg₃Si₂O₅(OH)₄)

Tumbled granite

Granite, a coarse-grained felsic intrusive igneous rock

Dyed Agate

Silicon Dioxide (SiO2) with synthetic dyes

Not a geological specimen

N/A (man-made object)

Painted River Rock

Polished fluvial clast with acrylic/synthetic pigment coating

Pink Dyed Agate

Silicon Dioxide (SiO2) with synthetic pigment

Turquoise cabochon pendant

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