Mineraloid (Synthetic)

Fulgurite

Fulgurite (Lechatelierite)

Black Obsidian

Volcanic Glass (SiO2 + impurities)

Gemstone ring (stones not identifiable from image)

Unknown; the ring appears to contain two yellow stones and one colorless stone, possibly faceted gemstones or simulants

Gemstone rings (stones not reliably identifiable)

The pale stone may be quartz or another translucent gem; the red stone may be ruby, garnet, or synthetic corundum. Image detail is insufficient for identification.

Opalite

Synthetic Opalite Glass / Opalized Glass

Blue cabochon gemstone ring

Uncertain; likely blue sapphire (corundum, Al₂O₃), blue topaz, or synthetic glass/spinel

Red gemstone ring, likely ruby or synthetic ruby

Corundum (Al₂O₃), chromium-colored; the image alone cannot confirm whether it is natural or synthetic

Faceted Gemstones (Mixed)

Various (e.g., Corundum, Beryl, Quartz, or synthetic equivalents)

Ruby ring

Corundum (Al₂O₃), red variety colored mainly by chromium

Ceramic or Polished Stone Heart (Anthropogenic Material)

Glazed Ceramic (Silicon Dioxide based coating on Alumina Silicate body) or Polished Limestone/Marble (Calcium Carbonate, CaCO3)

Tumbled black stone, likely black obsidian

Obsidian — volcanic glass, primarily SiO₂

Gold Sheen Obsidian

Volcanic Glass (SiO2 + Fe3O4 / Gas Inclusions)

Cubic Zirconia (Jewelry Setting)

Zirconium Dioxide (ZrO2)

Obsidian

Volcanic glass

Limonite (Ironstone)

Limonite (mixture of hydrated iron oxides, primarily Goethite α-FeO(OH))

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with impurities)

White Opal

Hydrated Silica (SiO2·nH2O)

Abalone Shell (Nacre)

Aragonite (CaCO3) - Biogenic Mineral

Gemstone Ring

Various (Likely Glass, Cubic Zirconia, or assorted semi-precious stones)

Small colored gemstone or glass cabochons (uncertain)

Not identifiable from the image; the pieces may be colored glass or synthetic stones rather than natural minerals.

Red cabochon gemstone ring (likely ruby or red spinel; identity unconfirmed)

Possibly corundum (ruby, Al₂O₃) or spinel (MgAl₂O₄); visual identification alone cannot distinguish these from glass or synthetic stones.

Ruby (Raw Corundum)

Al2O3 (Aluminum Oxide)

Cubic Zirconia and Synthetic Ruby Jewelry

Cubic Zirconia (ZrO2) and Synthetic Corundum (Al2O3)

Obsidian

Volcanic Glass (Amorphous SiO2)

Obsidian

Volcanic Glass (SiO2 rich)

Polished mahogany obsidian (probable)

Volcanic glass; chiefly rhyolitic silica-rich glass (SiO₂), compositionally near rhyolite

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Fulgurite

Fulgurite (Lechatelierite-rich fused silica)

Limonite (Iron Ore)

Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O)

Sapphire

Corundum (Al2O3)

Opalite

Man-made glass (traditionally simulated Opal)

Pearl

Calcium Carbonate (Aragonite) with Conchiolin; formula: CaCO3

Silicon Carbide (Carborundum)

Silicon Carbide, SiC

Red glassy mineral specimen, likely synthetic ruby or red spinel

Most consistent with synthetic corundum (Al₂O₃, ruby) or synthetic spinel (MgAl₂O₄); exact identification requires testing

Opalite

Synthetic glass / Opaque silicious glass

Blue Goldstone

Man-made glass with crystalline copper/cobalt inclusions

Note on Image Identification: Textile

N/A (Anthropogenic material)

Obsidian

Volcanic Glass (70% or more SiO2)

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with impurities)

Amber in Matrix

Succinite (Carbon-based organic polymer)

Obsidian

Obsidian (Amorphous volcanic glass, predominantly SiO2)

Obsidian

Volcanic glass