Mineraloid (Synthetic)

Red cabochon ring, likely ruby or synthetic ruby

Corundum (Al₂O₃), possibly chromium-bearing ruby; the image cannot establish whether it is natural or synthetic

Hematite bead strand

Hematite, α-Fe₂O₃ (iron(III) oxide)

Faceted citrine-colored gemstone (likely synthetic/display stone)

Quartz, SiO₂, if natural citrine; possibly synthetic sapphire or glass imitation

Carborundum (Silicon Carbide)

Silicon carbide (SiC)

Clear quartz crystal sphere

Quartz (silicon dioxide, SiO₂)

Blue Sapphire

Corundum (Al2O3)

Cubic Zirconia (CZ)

Cubic Zirconium Dioxide (ZrO2)

Dyed Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Pink/red faceted gemstone, likely synthetic ruby or pink sapphire

Corundum, aluminum oxide (Al₂O₃); likely lab-grown or treated material

Pink corundum (likely synthetic or treated sapphire)

Corundum, Al₂O₃; pink coloration commonly from chromium or treatment

Ruby

Corundum (Al2O3 with Chromium traces)

Diamond (or Cubic Zirconia simulant)

Carbon (C) / Zirconium Dioxide (ZrO2)

Emerald

Beryl (Be₃Al₂Si₆Oထ₈) with Chromium/Vanadium impurities

Strawberry Quartz (Hematoid Quartz)

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)

Synthetic Marbled Aggregate (Footwear Component)

Ethylene-vinyl acetate (Croslite™)

Blue Goldstone

Aventurine Glass

Colorless Gemstone (possibly Diamond or Cubic Zirconia)

C (Diamond) or ZrO2 (Cubic Zirconia)

Pearl and Garnet Glass

Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass

Cat's Eye Moonstone (Simulated/Synthetic or natural Cat's Eye Quartz/Glass)

There is no single scientific name. The appearance suggests either: Moonstone (feldspar group), Cat's Eye Quartz (SiO2), Apatite (Ca5(PO4)3(F,Cl,OH)), or most likely a synthetic material such as Fiber Optic Glass or 'Opalite' (a type of glass).

Green Opal (Prase Opal)

SiO2 · nH2O (Hydrated Silicon Dioxide)

Blue glass-like bead or gemstone keychain ornament

Indeterminate; likely cobalt-blue glass or synthetic blue spinel, not identifiable as a natural mineral from the image

Mahogany Obsidian

Volcanic glass (Silicon Dioxide with Hematite/Magnetite inclusions)

Obsidian (likely black volcanic glass)

Obsidian; primarily amorphous volcanic silica glass, approximately SiO₂-rich rhyolitic composition

Obsidian

Obsidian (Volcanic Glass)

Snowflake Obsidian

Spherulitic Volcanic Glass (SiO2 + impurities)

Obsidian

Volcanic Glass (Silica / SiO2)

Limonite Concretion

Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)

Obsidian

Volcanic Glass (predominantly SiO2)

Likely amber cabochon ring

Amber, fossilized tree resin (organic mineraloid; not a mineral)

Amber beads

Amber — fossilized tree resin; organic mineraloid, not a mineral

Mahogany Obsidian

Volcanic Glass (predominantly SiO2 with Fe2O3 inclusions)

Faceted black gemstone, likely black spinel

Spinel (MgAl₂O₄); identification from the image is uncertain

Faceted color-change gemstone, likely synthetic alexandrite or glass imitation

Alexandrite: chrysoberyl, BeAl₂O₄; exact identification requires gemological testing

Goldstone

Man-made glass infused with copper crystals

Blue sapphire (faceted gemstone)

Corundum, Al₂O₃; blue color typically from trace iron and titanium

Red corundum (ruby) crystal fragment

Corundum, Al₂O₃; ruby is red corundum colored mainly by chromium

Red Agate (Carnelian)

Silicon Dioxide (SiO2)

Carnelian

Carnelian (Cryptocrystalline Quartz, SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Blue faceted gemstone, likely synthetic sapphire or blue spinel

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

Red synthetic corundum (ruby-colored lab-grown sapphire)

Corundum, aluminum oxide (Al₂O₃), likely synthetic and chromium-colored

Ruby (Faceted)

Corundum (Al2O3:Cr)