Not A Rock (Synthetic Material)

Goldstone (with Tiger's Eye and Quartz)

Aventurine glass (Synthetic SiO2 with Cu inclusions)

Concrete Paver (Artificial Cementitious Rock)

Hydrated Portland Cement Aggregate

Moissanite

Silicon Carbide (SiC)

Sapphire

Corundum (Al2O3)

Chipped Glass/Plastic Fragment

Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic

Opalite

Opalescent Glass (SiO2 + coloring agents)

Goldstone

Avventurina (Cu + SiO2 glass)

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Goldstone (Synthetic Aventurescence Glass)

Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)

Pearl and Garnet Glass

Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass

Portable Ceramic Space Heater

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

Cubic Zirconia (Faceted)

Zirconium dioxide (ZrO2)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Blue glass-like gemstone specimen (likely dyed or synthetic quartz)

Uncertain; possibly blue-dyed quartz or synthetic glass, not confidently identifiable from the image

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Clear quartz sphere

Quartz (silicon dioxide, SiO₂), likely rock crystal or low-grade milky quartz

Tumbled amethyst

Amethyst, purple quartz (SiO₂), colored by trace iron and irradiation

Tumbled amethyst

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

Red synthetic corundum (ruby-colored lab-grown sapphire)

Corundum, aluminum oxide (Al₂O₃), likely synthetic and chromium-colored

Faceted Clear Quartz or Diamond Simulant

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

Cubic Zirconia (Set in Jewelry)

Zirconium Dioxide (ZrO2)

Painted River Rock

Painted Quartzite or Smooth Siltstone

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation

SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)

Diamond (or Diamond Simulant)

C (Carbon) or synthetic equivalent

Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)

Silicon Dioxide (SiO2) with inclusions/dye

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Opalite

Man-made glass (traditionally simulated Opal)

Pink/red faceted gemstone, likely synthetic ruby or pink sapphire

Corundum, aluminum oxide (Al₂O₃); likely lab-grown or treated material

Bouncy Ball (Synthetic Rubber Polymer)

Polybutadiene / Ethylene Vinyl Acetate (EVA)

Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)

Silicon Dioxide (SiO2) with metallic inclusions

Hematite

Iron(III) oxide, Fe2O3

Diamond (or Cut Gemstone / Cubic Zirconia)

Carbon (C)

Cubic Zirconia (Simulated Diamond)

Zirconium dioxide (ZrO2)

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Carborundum (Silicon Carbide)

Silicon carbide (SiC)

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

Crackled Quartz (Dyed)

Silicon Dioxide (SiO2)

Zircon

Zirconium Silicate (ZrSiO₄)

Clear quartz crystal sphere

Quartz (silicon dioxide, SiO₂)

Green cabochon gemstone, likely aventurine or dyed chalcedony

Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony

Blue Goldstone

Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)

Assorted Semi-Precious Gemstone Crosses

Quartz, Silicates, Carbonates (various)