Manufactured Glass (Simulant)

Opalite

Man-made opalescent glass (SiO2 + metal oxides)

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (synthetic ZrO₂), possibly glass or white sapphire

Dyed Pink Quartzite (Jadeite Simulant)

Silicon Dioxide (SiO2) with organic dye

Opalite

Synthetic Fluorescent Glass (SiO2 + impurities)

Opalite

Man-made Glass (Synthetic Opalized Glass)

Opalite

Synthetic Opalised Glass

Polished black stone, likely obsidian

Volcanic glass; primarily silica-rich, noncrystalline SiO₂

Likely obsidian (possibly tektite or slag glass)

Volcanic glass; primarily SiO₂, noncrystalline

Faceted purple-blue beads, likely synthetic glass or treated gemstone

Indeterminate; possible synthetic corundum, synthetic spinel, or dyed quartz (SiO₂)

Clear quartz sphere or polished quartz cabochon (tentative)

Quartz, silicon dioxide (SiO₂); appearance may also be consistent with ordinary glass, which cannot be ruled out from the image alone

Glass Nugget (Tumbled Glass)

Amorphous Silicon Dioxide (SiO2) with additives

Likely polished black stone or obsidian

Obsidian (volcanic glass), chiefly SiO₂

Leopard jasper (orbicular jasper)

Silicified volcanic rock, chiefly microcrystalline quartz/chalcedony (SiO₂) with feldspar and iron-oxide inclusions

Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)

N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)

Jade

Jade can refer to two distinct minerals: Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (Na(Al,Fe3+)Si2O6). Based on the image, showing a relatively uniform green color and possibly slight translucence in bead form, it is very likely one of these, but determining which one from a photo is difficult without specific testing.

Opalite

Synthetic Glass (Simulated Moonstone/Opal)

Weathered sandstone or iron-stained sedimentary stone

Quartz-rich sandstone, commonly arkose or lithic sandstone; composition cannot be confirmed visually

Green Glass Cullet / Recycled Glass

Amorphous Silicon Dioxide (SiO2) with various metal oxides

Likely blue glass or synthetic gemstone jewelry

Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass

Tumbled pale quartz/chalcedony fragment

Quartz (SiO₂), possibly microcrystalline chalcedony

Faceted Glass (Costume Jewelry)

Amorphous Silicon Dioxide with colorants (Glass)

Blue Sapphire

Corundum (Al2O3)

Polished black obsidian pyramid/block

Obsidian — natural volcanic glass, chiefly rhyolitic silica (approximately 70–75% SiO₂)

Vesicular volcanic rock, likely pumice

Pumice (highly vesicular volcanic glass; composition commonly rhyolitic to andesitic)

Goldstone

N/A (Synthetic Glass with Copper Inclusions)

Costume Jewelry with Synthetic Gemstones

Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)

Blue Goldstone

Goldstone (artificial glass)

Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)

Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)

Quartzite

Metamorphic Quartzite (SiO2)

Blue Goldstone

Aventurine glass (Synthetic borosilicate glass with cobalt and metallic inclusions)

Black Opal (Triplet)

Hydrated Silica (SiO2·nH2O)

Strawberry Quartz (or Rose Quartz / Cherry Quartz)

Silicon Dioxide (SiO2) with Lepidocrocite, Hematite, or Goethite inclusions

Blue Obsidian (Cullet Glass)

Silicon Dioxide (Amorphous Glass)

Possibly tumbled dark stone or mineral specimen

Indeterminate from image; possibly black tourmaline, basalt, or another dark silicate

Likely polished dark stone or glassy mineral bead

Indeterminate; possibly obsidian, hematite, or a dark agate

Quartz pebble in concrete

Quartz (SiO₂), embedded in Portland-cement concrete

Crackle Quartz (Dyed)

SiO2 (Silicon Dioxide) - Treated

Chert (Flint variety)

Silicon Dioxide (SiO2)

Quartzite

Metamorphic Quartzite (SiO2)

Cullet Glass (Slag)

Amorphous Silicon Dioxide (Man-made)

Sea Glass (Uranium/Vaseline Glass variant)

Silicon Dioxide (SiO2) with trace Uranium Oxide (U3O8)

Tumbled black stone, likely obsidian

Obsidian (natural volcanic glass; mainly silica-rich rhyolitic composition)