Mineral Like (Natural Glass)

Epidote (Unakite component) / Green Quartzite

Ca2(Al,Fe)3(SiO4)3(OH)

Clear Quartz (faceted) / Diamond Simulant

Silicon Dioxide (SiO2) / Cubic Zirconia (ZrO2)

Tektite (Indochinite)

Tektite (Natural Glass, SiO2 + Al2O3)

Libyan Desert Glass

Libyan Desert Glass (Impactite)

Citrine Quartz

Silicon Dioxide (SiO2)

Likely gold-colored metal ring with a possible gemstone

Uncertain; possibly gold alloy (Au) with a small quartz or glass-like setting

Carved Stone Turtle

Carved Soapstone and Quartz

Amethyst cluster

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation

Tumbled blue glassy mineral, possibly sodalite or blue aventurine

Identification uncertain; likely sodalite (Na₈Al₆Si₆O₂₄Cl₂) or blue-dyed quartz/slag-like material

Amethyst (likely tumbled or cut fragment)

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation

Sandstone

Arenite (SiO2 principal component)

Green Quartz (Prasiolite/Adventurine)

Silicon Dioxide (SiO2) with inclusions

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Yellow Quartz (Citrine-colored Quartz Pebble)

Silicon Dioxide (SiO2)

Blue glass-like gemstone, likely synthetic spinel or glass

Uncertain; possibilities include synthetic cobalt-blue spinel (MgAl₂O₄) or cobalt-colored glass

Sandstone

Arenite (primarily SiO2 with trace Fe2O3)

Smoky Quartz

Silicon Dioxide (SiO2)

Sandstone

Arenite (SiO2 based)

Glass Nugget (Tumbled Glass)

Amorphous Silicon Dioxide (SiO2) with additives

Corundum (Pink Sapphire / Ruby)

Al2O3 (Aluminum Oxide)

Quartz (Citrine/Milky variety)

Silicon Dioxide (SiO2)

Citrine

Silicon Dioxide (SiO2) with trace Iron

Blue slag glass or dyed glass-like industrial material

Amorphous silicate glass; likely copper-bearing blue slag, but possibly colored man-made glass

Opalite

Synthetic Opalised Glass

Green iridescent glass cabochon or synthetic gemstone

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

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities and natural radiation

Green Aventurine

Quartz with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Citrine (or Yellow Chalcedony / Quartz)

Silicon Dioxide (SiO2)

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

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

Sandstone

Arenite (SiO2 primarily)

Aura Quartz (Titanium or Angel Aura coated)

Silicon Dioxide (SiO2) with metallic vapor coating

Yellow Quartz (Citrine/Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Quartz (likely heat-treated or colored cord)

Silicon Dioxide (SiO2)

Dyed Quartz Geode

Dyed crystalline quartz (Silicon Dioxide, SiO2)

Tumbled amethyst

Quartz, crystalline silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation

Smoky Quartz with Feldspar

Silicon Dioxide (SiO2) with Potassium Feldspar (KAlSi3O8)

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Garden Quartz (Lodalite)

Silicon Dioxide with various mineral inclusions (SiO2)

Sandstone

Arenite (SiO2 principal)

Citrine

Silicon dioxide (SiO2)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Clear Quartz

Silicon Dioxide (SiO2)