Mineraloid Like Synthetic Material

Black Obsidian

Volcanic Glass (Amorphous SiO2)

Blue glass-like cabochon, likely dyed or synthetic material

Uncertain; possibly dyed chalcedony, synthetic spinel, or blue glass

Faceted dark gemstone, likely black spinel

Spinel, MgAl₂O₄ (visual identification is uncertain; black sapphire or other dark gems can look similar)

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)

Anthracite Coal

Anthracite (Carbon-rich mineraloid)

Silicon Carbide (Carborundum)

Moissanite (SiC), though mostly synthetic

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

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

Obsidian

Obsidian (Volcanic Glass)

Obsidian (likely black obsidian)

Volcanic glass, predominantly rhyolitic to dacitic silica-rich melt; approximate composition ~70–75% SiO₂

Red gemstone ring, likely synthetic ruby or red glass

Unidentified red faceted stone; ruby is corundum (Al₂O₃)

Cubic Zirconia and Synthetic Ruby Jewelry

Cubic Zirconia (ZrO2) and Synthetic Corundum (Al2O3)

Silicon Carbide (Carborundum)

Silicon Carbide, SiC

Blue glass-like gemstone, likely synthetic spinel or glass

Uncertain; possibilities include synthetic cobalt-blue spinel (MgAl₂O₄) or cobalt-colored glass

Snowflake Obsidian

Hydrated Volcanic Glass (primarily SiO2) with Cristobalite inclusions

Red/pink faceted gemstone, likely synthetic ruby or red glass

Corundum (Al₂O₃) if ruby; identity cannot be confirmed visually

Opalite

Synthetic Opalised Glass

Amber

Succinite (Organic Mineraloid) - C10H16O

Blue opalite (often sold as synthetic opal)

Opalite glass; amorphous hydrated silica if natural opal (SiO₂·nH₂O)

Black Obsidian

Obsidian (Volcanic Glass, SiO2 + impurity)

Obsidian

Volcanic Glass (Amorphous silicon dioxide with impurities)

Gold Sheen Obsidian

Obsidian (volcanic glass with SiO2 + gas inclusions)

Amber-set ring

Amber (fossilized plant resin; organic mineraloid), set in a metal ring

Fulgurite

Luechatelierite (SiO2 glass)

Polished honey-yellow quartz-like crystal

Quartz (SiO₂), possibly citrine or heat-treated amethyst

Red gemstone ring, possibly synthetic ruby or red glass

Unidentified red stone; ruby is corundum (Al₂O₃), but the image cannot confirm its identity

Obsidian

Obsidian (volcanic glass; primarily SiO2)

Jet

Lignite (Anthracite-grade compact coal)

Amber-bearing rough specimen

Fossilized plant resin (amber; organic mineraloid), commonly succinite

Purple cabochon gemstone, likely amethyst or purple sapphire/spinel

Indeterminate from image; possible quartz (SiO₂), corundum (Al₂O₃), or spinel (MgAl₂O₄)

Obsidian

Volcanic Glass

Obsidian

Volcanic Glass

Black Obsidian

Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)

Faceted black gemstone, likely black spinel

Spinel, MgAl₂O₄ (identification from appearance is uncertain)

Obsidian

Volcanic Glass (SiO2)

Faceted clear quartz (rock crystal), likely a cut imitation or low-grade gemstone

Quartz, silicon dioxide (SiO₂)

Tumbled labradorite beads

Labradorite, a calcium-rich plagioclase feldspar (approximately (Ca,Na)(Al,Si)₄O₈)

Ruby (or potential synthetic/imitation)

Corundum (Al2O3)

Blue-green opal, likely polished common or synthetic opal

Opal (hydrated amorphous silica, SiO₂·nH₂O); identification from the image is uncertain

Black faceted gemstone, possibly black spinel or synthetic material

Undetermined from image; candidates include spinel (MgAl₂O₄) or black sapphire (corundum, Al₂O₃)

Common Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Faceted clear gemstone in a metal setting

Unidentified transparent faceted gem; possibilities include quartz (SiO₂), topaz (Al₂SiO₄(F,OH)₂), or glass—the image is insufficient for identification.

Green gemstone ring, possibly emerald

The green stone may be emerald (beryl, Be₃Al₂Si₆O₁₈), but the photo cannot confirm its identity; the setting appears to be silver-colored metal.