Mineral Simulant (Synthetic Glass)

Vesicular Basalt (Scoria)

Extrusive Mafic Volcanic Rock (FeO-SiO2-MgO)

Silicon

Element Si

Man-made Glass (Tumbled/Shaped)

Amorphous Silicon Dioxide (SiO2) with metal oxide colorants

Colorless faceted gemstone, likely diamond

Diamond; crystalline carbon (C)

Smoky Quartz

Silicon Dioxide (SiO2)

Faceted glass-like gemstone object

Likely synthetic glass or cubic zirconia; exact material cannot be confirmed from the image

Smoky Quartz

SiO2 (Silicon Dioxide)

Note: Item is not a geological specimen

Polyester mesh and Ethylene-vinyl acetate (EVA) polymer

Serpentinite

Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)

Ruby (mounted cabochon)

Corundum, Al₂O₃; red color typically from chromium

Faceted pale-green gemstone, likely prasiolite or green quartz

Quartz (SiO₂), likely prasiolite; identification is uncertain from the photograph

Strawberry Quartz (or Rose Quartz / Cherry Quartz)

Silicon Dioxide (SiO2) with Lepidocrocite, Hematite, or Goethite inclusions

Blue Sapphire

Corundum (Al2O3)

Ruby Lavender Quartz with Amethyst

Silicon dioxide with neodymium dopant (SiO2)

Lapis Lazuli

Lazurite-rich metamorphic rock (approx. Na6Ca2(Al6Si6O24)(S,SO4,Cl)1,2)

Smoky Quartz

Silicon dioxide with aluminum impurities (SiO2)

Digital Multimeter (Synthetic Object)

Digital Multimeter (DMM)

Green glassy cabochon, likely dyed or synthetic material

Uncertain; possibly green obsidian, chrysoprase, or synthetic glass

Possible blue sapphire

Corundum (Al₂O₃), possibly blue sapphire

Green faceted bead strand, likely dyed or synthetic material

Uncertain; possibly green-dyed quartz, glass, or lab-created emerald-like material

Serpentine (Nephrite-like Serpentine)

Serpentinite (Hydrous magnesium iron phyllosilicate)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

Faceted clear gemstone in a gold-colored ring

Unidentified transparent faceted gem; possibilities include colorless quartz (SiO₂), glass, or diamond (C)

Blue Sapphire

Corundum (Al2O3) with traces of Iron and Titanium

Green faceted gemstone, likely emerald

Beryl, Be₃Al₂Si₆O₁₈, colored green by chromium and/or vanadium

Green Glass (often marketed as 'Obsidian' or 'Green Quartz')

Amorphous Silica (SiO2) with copper or chromium additives

Man-made Jewelry (Metal and Glass/Plastic)

Synthetic Alloy and Amorphous Solid (SiO2/Polymer)

Pink Dyed Agate

Silicon Dioxide (SiO2) with synthetic pigment

Dyed Crackle Quartz

Silicon Dioxide (SiO2) with synthetic dye

Dyed Agate

Silicon Dioxide (SiO2) with synthetic dyes

Silicon Carbide (Carborundum)

Silicon Carbide (SiC)

Serpentine (Greenstone)

Antigorite, Lizardite, and Chrysolite mixture (Mg3Si2O5(OH)4)

Blue cabochon, likely dyed or synthetic material

Undetermined; possibly dyed chalcedony (SiO₂), glass, or synthetic corundum

Blue Goldstone

Aventurine Glass (SiO2 with Cobalt/Copper inclusions)

Star sapphire ring

Corundum (Al₂O₃), likely asteriated sapphire

Diamond (or Cubic Zirconia)

Cubic Carbon (C) or Zirconium Dioxide (ZrO2)

Colorless faceted gemstone, likely quartz

Quartz (SiO₂), probably rock crystal; exact identification is uncertain from the strongly backlit image

Blue faceted gemstone ring, likely synthetic sapphire or blue topaz

Uncertain from image; possible corundum (Al₂O₃) or topaz (Al₂SiO₄(F,OH)₂)

Gemstone-set silver jewelry piece

Likely mixed faceted gemstones in a silver-colored metal setting; stones may include sapphire, ruby/garnet, and yellow sapphire or citrine, but the image is insufficient for species-level identification.

Iridescent polished gemstone, likely opal

Common or precious opal (hydrated amorphous silica, SiO₂·nH₂O), possibly synthetic or glass imitation

Diamond (or Clear Quartz / Cubic Zirconia)

Carbon (C) or Silicon Dioxide (SiO2) / Cubic Zirconia (ZrO2)

Plastic Building Toy (Lego-style piece)

Acrylonitrile Butadiene Styrene (ABS)