Synthetic (Not A Rock Or Mineral)

Blue-green gemstone ring, likely treated turquoise or synthetic/treated beryl

Indeterminate from image; possibilities include turquoise (CuAl6(PO4)4(OH)8·4H2O), apatite, or treated beryl

Tumbled amethyst

Amethyst, purple quartz (SiO₂)

Hematite

Iron(III) oxide (Fe2O3)

Yellow faceted gemstone, likely citrine or synthetic glass

Citrine (quartz, SiO₂) is the leading natural possibility; visual identification is uncertain from the photograph

Green Fluorite (likely synthetic or heat-treated for jewelry)

Calcium Fluoride (CaF2)

Schist

N/A (a rock type, not a mineral formula)

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Blue Sapphire

Corundum (Al2O3 with trace Titanium and Iron)

Smoky Quartz

Silicon Dioxide (SiO2)

Ruby

Corundum (Al2O3 with Chromium trace elements)

Faceted clear gemstone, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂); exact identity is uncertain because the strong flash and cut obscure diagnostic features

Silicon

Element Si

Blue quartz crystal (likely synthetic or coated quartz)

Quartz, silicon dioxide (SiO₂); possible aqua-aura quartz

Diamond

Diamond (C)

Opal

Hydrated amorphous form of silica (SiO2·nH2O)

Likely amethyst cabochon ring

Quartz, SiO₂; purple coloration from trace iron and irradiation

Amphibolite

Amphibolite

Opalite

Synthetic Glass (typically Silica/Magnesium based with metal additives)

Diamond (or Diamond Simulant)

Native Carbon (C)

Build-A-Bear Plush (Non-Geological)

Polyester fibers (C10H8O4)n and Synthetic Polymers

Multi-stone gemstone ring

Likely faceted blue topaz or synthetic blue stone with clear stones, possibly cubic zirconia or diamond; metal setting appears silver-colored alloy

Ruby (Corundum)

Corundum (Aluminum Oxide) with chromium trace elements, Al2O3

Diamond ring

Diamond, crystalline carbon (C), likely a faceted mounted stone

Blue Goldstone

Synthetic Avanturine Glass (or Aventurine Glass)

Strawberry Quartz (or Rose Quartz / Cherry Quartz)

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

Dyed Blue Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Diamond (likely rough or included fragment)

Diamond, crystalline carbon (C), cubic crystal system

River Rock

Sedimentary Rock (various compositions)

White seed-bead gemstone strand, likely freshwater pearl or shell pearl

Pearl: nacreous calcium carbonate, chiefly aragonite (CaCO₃) in conchiolin; identification uncertain from image

Bismuth

Bismuth (Bi)

Diamond

Pure Carbon (C)

Fursuit (Synthetic Fur Specimen)

Canis anthropomorphus syntheticus

Ruby in Fuchsite

Corundum (Al2O3) in Fuchsite (K(Al,Cr)3Si3O10(OH)2)

Emerald

Beryl (Be3Al2(SiO3)6)

Opalite

Synthetic Glass, SiO2 base with metallic inclusions

Tumbled opalite (likely synthetic glass)

Opalite; typically man-made opalescent soda-lime glass, not a recognized mineral species

Composite Turquoise or Reconstituted Turquoise with Copper inclusions

CuAl6(PO4)4(OH)8·4H2O (Turquoise) mixed with matrix and copper/bronze flakes

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Faceted citrine-colored gemstone

Likely citrine (quartz, SiO₂); possibly yellow glass or synthetic gem

White Sapphire

Corundum (Al2O3)

Acrylic or Resin (Synthetic Imitation)

Polymethyl Methacrylate (PMMA) or Polyepoxide

Blue Goldstone

Aventurine glass (Synthetic borosilicate glass with cobalt and metallic inclusions)