Man Made Mineral Simulant (Glass)

Porcelain Tile (Sandstone-look)

Man-made Ceramic (resembling Quartz-rich Sandstone)

Likely turquoise-colored mineral or dyed stone

Unidentified opaque blue-green material; turquoise, chrysocolla, dyed howlite, or glass cannot be distinguished from the image alone

Cut purple gemstone, likely synthetic cubic zirconia or glass

Undetermined; possible cubic zirconia (ZrO₂)

Rainbow Hematite (Man-made/Treated)

Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)

Black faceted gemstone, possibly black spinel or onyx

Undetermined; candidates include spinel (MgAl₂O₄) or chalcedony (SiO₂)

Man-made Slag (Industrial Byproduct)

Anthropogenic Glassy Residue

Red Sandstone or Brick Fragment

Arenite (if sandstone)

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

Faceted glass-like gemstone (likely synthetic quartz or cubic zirconia)

Identification uncertain; possibilities include synthetic quartz (SiO₂) or cubic zirconia (ZrO₂)

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Ruby (Faceted)

Corundum (Al2O3:Cr)

Goldstone (Brown)

Aventurine glass

Colorless faceted gemstone, likely synthetic cubic zirconia

Cubic zirconia (zirconium dioxide, ZrO₂); natural diamond is a less likely alternative

Crescent Pebble

Weathered Quartzite or Sandstone Fragment

Polished blue calcite sphere (tentative identification)

Calcite, CaCO₃; blue color generally results from trace impurities or inclusions

Cut diamond-like gemstone

Likely cubic zirconia (zirconium dioxide, ZrO₂) or glass; natural diamond (carbon, C) cannot be confirmed from an image

Crackle Glass (Simulated Gemstone)

Amorphous Solid (SiO2)

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 glassy cabochon, likely synthetic ruby or red glass

Uncertain; possible synthetic corundum (Al₂O₃, chromium-colored) or man-made glass

Chert (Arrowhead/Artifact Fragment)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Tumbled aqua glassy mineral specimen, likely chrysocolla or turquoise imitation

Uncertain from image; possible chrysocolla (hydrated copper aluminosilicate, variable composition) or dyed/man-made glass

Vesicular basalt (weathered scoria)

Scoriaceous basalt; chiefly plagioclase, clinopyroxene, olivine, and iron-titanium oxides

Rounded graywacke or sandstone cobble

Lithified clastic sandstone; likely quartz–feldspar–lithic grain aggregate in a silica or calcite matrix

Dyed Crackle Quartz

Silicon Dioxide (SiO2) with synthetic dye

Green Agate

Silicon dioxide (SiO₂)

Faceted yellow-brown gemstone ring, possibly citrine

Unidentified faceted gem; citrine is quartz (SiO₂), but the photo is insufficient for a reliable identification

Hematite Beads

Hematite (Fe2O3)

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Polymictic conglomerate or breccia (possibly concrete-like aggregate)

Lithified polymictic gravel; clasts may include basalt, granite, quartzite, and other silicates

Man-made Synthetic Material (Costume Faux Fur)

Synthetic Polymer (Polyester/Acrylic)

Faceted Clear Quartz or Diamond Simulant

Silicon Dioxide (SiO2) if Quartz or Cubic Zirconia (ZrO2) if Synthetic

Sapphire

Corundum (Al2O3)

Cubic Zirconia (CZ)

Zirconium dioxide (ZrO2)

Diamond

C (Native Carbon)

Green glassy mineral specimen, likely rough emerald or green fluorite

Tentatively beryl (Be₃Al₂Si₆O₁₈), emerald variety; synthetic/man-made glass cannot be excluded from the photograph

Pet Rock (Man-made Quartzite or Granite Cobble)

Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica

Goldstone

N/A (Synthetic Glass with Copper Inclusions)

Faceted colorless gemstone, likely glass or diamond imitation

Unidentified; possibly diamond (carbon, C) or cubic zirconia (zirconium dioxide, ZrO₂)

Man-made Ceramic / Clay Figurine

Aluminosilicate Ceramic (Processed Clay)

Man-made Synthetic Material (Not a rock or mineral)

Polyester (Polyethylene terephthalate) / Faux Fur

Blue slag glass / industrial smelter slag

Man-made iron-rich silicate slag; composition variable, commonly Fe–Ca–Mg–Al silicates with glassy phases

Quartzite (Engineered Stone)

Silicon Dioxide (SiO2) based synthetic composite