Manufactured Glass (Simulant)

Goldstone (likely blue-free synthetic goldstone pendant)

Synthetic aventurine glass; silica glass with dispersed metallic copper crystals

Polished black star-shaped stone, likely black obsidian

Obsidian (volcanic glass), primarily SiO₂

Small rounded pebble (likely quartz or quartz-rich stone)

Uncertain; possibly microcrystalline quartz (SiO₂)

Likely polished black-and-white stone fragment

Indeterminate from image; possibly tourmalinated quartz, black-and-white jasper, or coated stone

White/green translucent tumbled mineral fragment

Likely calcite (CaCO₃), possibly fluorite (CaF₂) or glass-like feldspar; visual identification is uncertain

Opalite-style pendant (likely synthetic glass, not natural opal)

Opalescent glass; commonly sold as “opalite” (not a recognized mineral species)

Green glass cabochon or tumbled stone

Indeterminate; likely man-made glass, possibly aventurine glass rather than a natural mineral

Polished black obsidian

Volcanic glass; predominantly rhyolitic silica (SiO₂), with minor iron, magnesium, and alkalis

Likely obsidian (possibly tektite or slag glass)

Volcanic glass; primarily SiO₂, noncrystalline

Green sea glass (likely bottle glass)

Human-processed soda–lime silicate glass; not a natural mineral or rock

Opalite glass sphere (likely synthetic imitation)

Man-made opalescent glass; not natural opal

Likely polished black stone or obsidian

Obsidian (volcanic glass), chiefly SiO₂

Likely polished dark stone (identity uncertain)

Undetermined; possibly polished basalt, chert, or another dark silicate rock

Polished black stone, likely black obsidian

Obsidian — volcanic glass, chiefly SiO₂

Iron-rich breccia or weathered ironstone

Goethite–hematite-bearing limonite, possibly with quartz and altered rock fragments

Blue cabochon gemstone, likely synthetic glass or dyed stone

Indeterminate from image; possible glass, synthetic spinel, sodalite, or lapis lazuli

Polished black stone, likely obsidian

Volcanic glass; primarily silica-rich, noncrystalline SiO₂

Quartz-bearing granite or granitic gneiss

Granite; chiefly quartz (SiO₂), feldspar, and dark mica/amphibole

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

Quartz fragment

Quartz (silicon dioxide, SiO₂)

Tumbled blue-green stone, possibly dyed turquoise or chrysocolla

Uncertain; turquoise is hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Opalite (likely man-made opalescent glass)

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

Dark green faceted gemstone ring

Likely green tourmaline (dravite/elbaite) or green glass imitation; visual identification is inconclusive

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

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

Polished black stone, likely black obsidian

Obsidian, volcanic glass; primarily silica-rich SiO₂ with minor feldspar, iron, and magnesium

Opalite

Synthetic Glass (Simulated Moonstone/Opal)

Blue-and-white opalite sphere

Opalite (commercial synthetic or glass-based imitation; not true opal), typically silica glass or synthetic opalescent material

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.

Likely quartz-bearing rock fragment

Quartz (SiO₂), possibly with calcite or feldspar

Black tourmaline (likely schorl), polished

Schorl tourmaline — NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Leopard jasper (orbicular jasper)

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

Tumbled greenstone / altered basalt pebble

Fine-grained mafic volcanic rock, likely basalt or greenstone; commonly composed of plagioclase, pyroxene, chlorite, epidote, and iron oxides

Glass Nugget (Tumbled Glass)

Amorphous Silicon Dioxide (SiO2) with additives

Polished black stone, likely black obsidian

Obsidian (volcanic glass; predominantly SiO₂)

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)

Blue Obsidian (Cullet Glass)

Silicon Dioxide (Amorphous Glass)

Faceted Glass (Costume Jewelry)

Amorphous Silicon Dioxide with colorants (Glass)

Likely blue glass or synthetic gemstone jewelry

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

Polished black obsidian

Volcanic glass; primarily silica-rich rhyolitic composition (SiO₂)

Small rounded pebble, likely sandstone or weathered limestone

Indeterminate clastic carbonate/siliciclastic pebble; mineral composition appears dominated by quartz, feldspar, and/or calcite

Weathered sandstone or iron-stained sedimentary stone

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

Black tumbled stone, likely obsidian

Volcanic glass (obsidian), primarily amorphous SiO₂