Synthetic (Not A Rock Or Mineral)

Clear Quartz (faceted) / Diamond Simulant

Silicon Dioxide (SiO2) / Cubic Zirconia (ZrO2)

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

Quartz, silicon dioxide (SiO₂)

Green faceted gemstone, likely emerald or synthetic emerald

Beryl, Be₃Al₂Si₆O₁₈, colored green by chromium and/or vanadium; identity cannot be confirmed visually

Parti Sapphire

Corundum (Al2O3)

Tumbled basalt (likely vesicular basalt)

Basalt; primarily plagioclase, clinopyroxene, and olivine, with iron oxides

Eroded Brick or Pumice-like Scoria

Vesicular Basalt / Scoria (Anthropogenic variant: Eroded Firebrick)

Opal stud earrings

Opal, hydrated amorphous silica (SiO₂·nH₂O)

Diamond (or Diamond Simulant / Melee)

Carbon (C) / or synthetic cubic zirconia (ZrO2)

Ruby / Red Tourmaline

Corundum (Al2O3) or Elbaite (Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)4)

Amethyst (Resin Carving/Orgonite)

Silicon Dioxide (SiO2) with iron impurities

Crackled Quartz (Dyed)

Silicon Dioxide (SiO2)

Opalite

Synthetic glass / Simulated opal

Smoky Quartz

Silicon Dioxide (SiO2)

Dyed Alum or Dyed Quartz (Ornamental Crystal)

Silicon Dioxide (SiO2) or Potassium Alum [KAl(SO4)2·12H2O]

Coarse-grained mafic igneous rock, likely gabbro

Gabbro; chiefly calcium-rich plagioclase feldspar and pyroxene, with possible olivine and amphibole

Blue glassy-looking specimen, possibly dyed or coated mineral

Not identifiable from the photograph; possibilities include dyed quartz or glassy slag, but composition cannot be established visually.

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)

Colorless faceted gemstones, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂), trigonal crystal system

Pink-red faceted gemstone, possibly synthetic corundum or spinel

Uncertain; possible ruby (corundum, Al₂O₃) or red spinel (MgAl₂O₄)

Ruby

Corundum (Al2O3 with Chromium)

Opalite (likely man-made opalescent glass)

Opalite; not a true mineral, typically synthetic opalescent glass (silica-based)

Opalite

Synthetic Glass (Simulated Opal)

Pink tumbled stone, likely dyed howlite or magnesite

Most likely magnesite (MgCO₃) or howlite [Ca₂B₅SiO₉(OH)₅], artificially dyed pink; exact identification requires testing.

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Weathered iron-rich rock fragment

Provisional identification: limonite/goethite-rich material, likely an ironstone fragment

Opalite

Synthetically produced glass (Silicon Dioxide with metallic inclusions)

Lapis Lazuli (Raw)

Lazurite-rich metamorphic rock; Na3Ca(Al3Si3O12)S

Lapis Lazuli

Lapis Lazuli (Rock composed chiefly of lazurite, calcite, and pyrite)

Bauxite

Bauxite (mixture of Hydrous Aluminum Oxides)

Note: Item is not a geological specimen

Polyester mesh and Ethylene-vinyl acetate (EVA) polymer

Opalite

Synthetic glass (SiO2 + metal additions)

Milky quartz (likely rough quartz crystal)

Quartz, silicon dioxide (SiO₂)

Ruby (mounted cabochon)

Corundum, Al₂O₃; red color typically from chromium

Green iridescent glass cabochon or synthetic gemstone

Likely synthetic glass; possibly coated synthetic quartz or lab-created green gemstone

Yellow quartz-bearing rock, possibly sulfur-stained quartz or calcite

Indeterminate; likely quartz (SiO₂) and/or calcite (CaCO₃) with yellow iron/sulfur staining

Opalite (a synthetic glass)

Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant

Green Aventurine

Quartz with fuchsite inclusions (SiO2)

Lapis Lazuli

Complex rock primarily containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Rock crystal (clear quartz)

Quartz, silicon dioxide (SiO₂), likely milky/included quartz

Cubic Zirconia (Diamond Simulant)

Zirconium Dioxide (ZrO2)

Amethyst (faceted gemstone)

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron-related defects

Smoky Quartz

Silicon Dioxide (SiO2)