Mineraloid (Man Made)

Goldstone

Aventurine glass

Man-made earbud charging case (Not a rock or mineral)

Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components

Opalite

Man-made opalescent glass (SiO2 + metal oxides)

Opalite

Synthetic Opalised Glass

Opalite (Man-made Glass)

Fused glass (typically made of dolomite and metal opacifiers)

Goldstone (Brown/Gold)

Aventurine Glass (Man-made glass with Copper inclusions)

Porcelain Tile (Sandstone-look)

Man-made Ceramic (resembling Quartz-rich Sandstone)

Opalite crescent pendant

Opalite (man-made opalescent glass; not a natural mineral)

Sea Glass

Man-made vitreous material (silica-based glass)

Sea Glass

Man-made silicate glass (Amorphous silicon dioxide)

Polished labradorite sphere

Labradorite, calcic plagioclase feldspar ((Ca,Na)(Al,Si)₄O₈)

Polished labradorite pendant

Labradorite, a calcium-rich plagioclase feldspar (approximately NaAlSi₃O₈–CaAl₂Si₂O₈)

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Hematite

Iron(III) oxide (Fe2O3)

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Opalite (Man-made Glass)

Synthetic Opalised Glass

Opalite

Man-made Synthetic Glass (Silicon Dioxide with metal additives)

Silicon Carbide (Carborundum)

Silicon Carbide (SiC)

Red Sandstone or Brick Fragment

Arenite (if sandstone)

Titanium Coated Kyanite (Aura Kyanite)

Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating

Cherry Quartz

SiO2 (Silicon Dioxide with iron-rich inclusions/dye)

Likely clear quartz pebble or glassy quartz fragment

Quartz (silicon dioxide, SiO₂)

Aventurine Quartz

Silicon Dioxide (SiO2) with Fuchsite inclusions

Slag

Metallurgical by-product

Moldavite

Tektite (Impact Glass), ~80% SiO2 + Al2O3

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Cubic Zirconia (Man-made)

Cubic Zirconia (ZrO2) with Enamel and Metal Alloy

Tumbled opalite (likely man-made glass)

Opalite glass; a synthetic opalescent glass, not a natural mineral species

Bismuth

Bismuth (Bi)

Decorative mosaic cross containing mixed rock and glass fragments

Polychrome aggregate; likely quartz, feldspar, marble, granite, and assorted colored glass

Blue cabochon gemstone, likely synthetic glass or dyed stone

Indeterminate from image; possible glass, synthetic spinel, sodalite, or lapis lazuli

Sandstone (with man-made markings)

Arenite (composed primarily of Quartz, SiO2)

Cubic Zirconia (Diamond Simulant)

Zirconium Dioxide (ZrO2)

Opalite

Synthetic Opalised Glass

Opalite

Synthetic Silicon Dioxide (SiO2)

Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Rainbow Hematite (Titanium Coated)

Iron(III) oxide (Fe2O3) with Titanium/Metal Oxide coating

Blue opalite glass (likely man-made)

Opalite glass; a silica-based amorphous glass, not natural opal

Tumbled opalite (likely man-made glass)

Opalite, a trade name for opalescent glass; not natural opal

Opalite (likely imitation opal glass)

Man-made opalescent glass; not a natural mineral (often sold as opalite)

Asphalt (Road Aggregate)

Bituminous Conglomerate / Asphalt Concrete