Synthetic Glass (Often Categorized As A Simulated Mineral)

Blue glassy mineral fragment, possibly dyed/cobalt-colored calcite or aragonite

Uncertain from image; vivid blue coloration may indicate treated calcite (CaCO₃), aragonite (CaCO₃), or synthetic glass

Ruby

Corundum (Al2O3 with Chromium traces)

Amber

Succinite (specifically for Baltic amber; general formula C10H16O)

Raw ruby (likely corundum)

Corundum, Al₂O₃; red color caused mainly by chromium

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Diamond (or Diamond Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Red-orange cabochon, likely carnelian or glass imitation

Carnelian: chalcedony (microcrystalline SiO₂), commonly iron-colored

Hematite

Iron(III) oxide (Fe2O3)

Diamond (Rough)

Diamond (Carbon, C)

Opal

Hydrous silicon dioxide (SiO2·nH2O)

Bismuth Crystal

Bismuth (element symbol Bi, atomic number 83)

Synthetic Resin Charm (Seal Shape)

Polymer Resin with plastic glitter / Polyethylene terephthalate glitters

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Tumbled hematite

Hematite (iron(III) oxide, Fe₂O₃)

Man-made Crystal (Lead Glass)

Lead oxide-doped Silica Glass (approx. SiO2 + PbO)

Emerald

Beryl (Be3Al2(SiO3)6) colored by Chromium and/or Vanadium

Blue chalcedony cabochon (probable)

Chalcedony, cryptocrystalline quartz; silicon dioxide (SiO₂)

Diamond (or Diamond Simulant)

Carbon (C) if diamond, various if simulant

Dalmatian jasper

Orbicular rhyolite, commonly sold as Dalmatian jasper; quartz- and feldspar-rich volcanic rock with dark amphibole/biotite inclusions

Amethyst (Resin Carving/Orgonite)

Silicon Dioxide (SiO2) with iron impurities

Cubic Zirconia (Man-made)

Cubic Zirconia (ZrO2) with Enamel and Metal Alloy

Faceted clear gemstone, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂); exact identity is uncertain because the strong flash and cut obscure diagnostic features

Diamond (Faceted Gemstone)

Native Carbon (C)

Blue Sapphire (in a faceted jewelry setting)

Corundum (Al2O3) with trace Iron and Titanium

Anthropogenic Heat Source (Electronic/Industrial Interface)

Thermal IR emission (Electronic infrastructure)

Azurite-Malachite (often a mixed specimen)

Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2(CO3)(OH)2. The specimen appears to be a natural mixture or intergrowth of these two minerals.

Synthetic Wolf Plush (Non-mineral)

Canis lupus similis (Prop material: Polyester & Synthetic fibers)

Prehnite

Prehnite, Ca2Al2Si3O10(OH)2

Polished hematite

Hematite (Fe₂O₃), likely a tumbled iron-oxide specimen

Dyed Agate Geode

Silicon Dioxide (SiO2) with artificial pigment

Terrazzo (Synthetic Composite Rock)

Cementitious or Epoxy Resin-bound Aggregates

Ruby (Pink to Red Corundum)

Al2O3 (Corundum with Chromium impurities)

Ruby

Corundum (Al2O3 with Chromium traces)

Ruby (Faceted)

Corundum (Al2O3 with Cr trace elements)

White chalcedony (possibly milky quartz) cabochon

Chalcedony, microcrystalline SiO₂; appearance may also represent milky quartz or synthetic imitation

Colorless faceted gemstone, likely glass or cubic zirconia

Uncertain; possible cubic zirconia (zirconium dioxide, ZrO₂) or synthetic glass

Diamond (Faceted)

Carbon (C)

Borosilicate Glass (Manufactured)

SiO2 + B2O3 (Silicon dioxide and Boron trioxide)

Rutilated Quartz

Quartz (SiO2) with Rutile inclusions (TiO2)

Note: Item is not a geological specimen

Guitar Components (Steel, Nickel, Plastic, Wood)

Likely silicon carbide (carborundum)

Synthetic silicon carbide (SiC), likely blue-green crystalline grit

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (zirconium dioxide, ZrO₂); visual confirmation is unavailable