Synthetic (Not A Natural Rock)

Smoky quartz and clear/white quartz bead necklace

Quartz, silicon dioxide (SiO₂); smoky variety colored by irradiation-related defects

Diamond or Cubic Zirconia

Carbon (diamond) or Zirconium dioxide (cubic zirconia)

Sapphire

Corundum (Al2O3)

Pink Anthracite Coal (dyed)

Anthracite Coal (Artificially Colored)

Opalite

Synthetic Glass (Amorphized Silicon Dioxide)

Turquoise ring

Turquoise, hydrated copper–aluminum phosphate (CuAl₆(PO₄)₄(OH)₈·4H₂O)

Orgonite Pyramid (containing Amethyst and mixed minerals)

Silicon Dioxide (SiO2) in synthetic resin

Blue Quartz / Glass Gemstone Pendant

SiO2 (Silicon Dioxide) or Synthetic Glass

Opalite

Synthetic Opalized Glass / Man-made Glass

Blue Sapphire (likely lab-grown or treated)

Corundum (Aluminum Oxide, Al2O3)

Opalite

Opalescent Glass (SiO2 + coloring agents)

Opalite

Synthetic Glass (Simulated Opal)

Polished turquoise cabochon pendant

Turquoise, hydrated copper-aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; likely stabilized or matrix-bearing material

Diamond

Diamond (C)

Ruby (mounted cabochon)

Corundum, Al₂O₃; red color typically from chromium

Paving-concrete aggregate with a rounded stone

Polymictic gravel aggregate; the central clast appears to be weathered sandstone or volcanic rock

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Blue Goldstone

Aventurine Glass

Faceted purple-blue beads, likely synthetic glass or treated gemstone

Indeterminate; possible synthetic corundum, synthetic spinel, or dyed quartz (SiO₂)

Blue Sapphire

Corundum (Al2O3 with Cr, Fe, and Ti trace elements)

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Pink-red faceted gemstone, possibly synthetic corundum or spinel

Uncertain; possible ruby (corundum, Al₂O₃) or red spinel (MgAl₂O₄)

Unidentified polished dark gemstone cabochon

Possibly hematite, obsidian, jet, or dark agate; image insufficient for a definitive identification

Dyed Agate Slice

Silicon Dioxide (SiO2) with artificial dyes

Opalite

Synthetic Opalized Glass (SiO2 + additives)

Opalite-style pendant (likely synthetic glass, not natural opal)

Opalescent glass; commonly sold as “opalite” (not a recognized mineral species)

Opalite (Synthetic Opalized Glass)

Synthetic Silicon Dioxide (SiO2) glass

Red gemstone ring, likely garnet or synthetic ruby

Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish

Clear quartz sphere

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

Pink faceted gemstone, likely synthetic or treated quartz

Quartz, silicon dioxide (SiO₂); exact identity cannot be confirmed from the image

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

Amorphous Silica (SiO2) with copper or chromium additives

Quartz Pebble

Silicon Dioxide (SiO2)

Silicon Carbide (Carborundum)

Moissanite (SiC), though mostly synthetic

Red glass-like crystal, likely synthetic ruby or red glass

Uncertain from image; possible corundum (ruby), Al₂O₃, or synthetic glass

Clear faceted gemstone, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂); visual identification is uncertain because the stone is heavily faceted and photographed with flash

Red faceted gemstone, likely synthetic ruby or red spinel

Ruby: corundum (Al₂O₃); spinel: MgAl₂O₄; visual identification alone is insufficient

Diamond (or Cubic Zirconia simulant)

Carbon (C) / Zirconium Dioxide (ZrO2)

Blue cabochon ring stone, likely sapphire or synthetic blue corundum

Corundum (Al₂O₃), possibly chromium/iron-titanium-bearing sapphire

Diamond (Faceted Colorless)

Diamond (Pure Carbon, C)

Cubic Zirconia (as a jewelry specimen)

Zirconium dioxide (ZrO2)

Diamond

Pure Carbon (C)

Red faceted gemstone ring

Likely synthetic ruby or red spinel; exact identification requires testing