Man Made (Synthetic Rock)

Likely polished quartz or glass-like mineral cabochon

Probably quartz (SiO₂), though the image cannot exclude man-made glass

Gabbro

Gabbro

Basalt

Basalt

Blue-violet faceted gemstone, likely amethyst

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

Lava Stone and Chakra Beads

Basalt (with various mineral/synthetic beads)

Silicon Carbide (Carborundum)

Silicon Carbide (SiC)

Possible sea glass (naturally frosted glass), not a confirmed geological specimen

Man-made silicate glass; composition varies, commonly soda-lime glass

Painted River Rock

Anthropogenic-modified Siliciclastic Sedimentary Rock

Green Glass Slag

Amorphous Silicon Dioxide (SiO2) with metal oxide impurities

Blue glassy cabochon, likely blue quartz or synthetic glass

Possibly dyed blue chalcedony/quartz (SiO₂); visual identification is inconclusive

Hematite bead strand

Hematite, α-Fe₂O₃ (iron(III) oxide)

Green glass-like cabochon, likely synthetic glass or resin

Unidentified green transparent material; possibly molded glass, synthetic spinel, or resin

Ornamental ring with likely blue sapphire and diamonds

Blue corundum (sapphire), Al₂O₃; surrounding stones appear diamond, C, set in gold-colored metal

Carnelian

Carnelian (Cryptocrystalline Quartz, SiO2)

Hematite Beads

Hematite (Fe2O3)

Plastic Building Toy (Lego-style piece)

Acrylonitrile Butadiene Styrene (ABS)

Tumbled blue-green stone, possibly aquamarine or chalcedony

Indeterminate from image; possibilities include beryl (Be₃Al₂Si₆O₁₈) or cryptocrystalline quartz (SiO₂)

Slate

Metamorphic Pelitic Rock

Dark blue polished stone pendant

Indeterminate; possibly sodalite, lapis lazuli, or blue slag/glass-like material

Purple faceted gemstone, possibly amethyst

Unconfirmed from image; if amethyst, quartz (SiO₂)

Emerald in Matrix

Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium

Blue-and-white opalite sphere

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

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Black beaded bracelet, likely black onyx or glass

Possibly chalcedony (microcrystalline quartz, SiO₂); the beads may instead be man-made glass

Blue Sapphire

Corundum (Al2O3) with traces of Iron and Titanium

Ruby-set gold ring

Ruby (corundum), Al₂O₃ colored red by chromium; mounted in a gold alloy

Lapis Lazuli

Lazurite-dominant metamorphic rock, Na8[Al6Si6O24]n(S,Cl,SO4,OH)2

Granite (with a dark inclusion or attached fragment)

Granite, mainly quartz, feldspar, and mica; the dark object cannot be identified confidently from the photo.

Rough Ruby

Corundum (Al2O3 with Chromium impurities)

Limonite (Iron Ore)

Limonite; FeO(OH)·nH2O

Colorless faceted gemstone (likely cubic zirconia)

Cubic zirconia, ZrO₂ (synthetic zirconium dioxide); possibly synthetic glass or lab-grown diamond

Dyed Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Decorative opal-like turtle mosaic

Likely imitation or assembled opal material; exact stones cannot be confirmed visually

Blue faceted gemstone, likely synthetic sapphire or blue spinel

Corundum (Al₂O₃) if sapphire; alternatively magnesium aluminate spinel (MgAl₂O₄)

Opal ring

Precious opal, hydrated amorphous silica (SiO₂·nH₂O), set in a metal ring

Cubic Zirconia

Zirconium dioxide (ZrO2)

Blue Goldstone

Aventurine Glass (Silicon Dioxide infused with Cobalt/Copper)

Fossilized Burrow

Trace fossil (Ichnogenus)

Likely silicon carbide (carborundum)

Synthetic silicon carbide (SiC), likely blue-green crystalline grit

Faceted Glass (Costume Jewelry)

Amorphous Silicon Dioxide with colorants (Glass)

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

Lava Rock (Dyed)

Basalt / Volcanic scoria