Mineraloid (Impact Glass)

Likely weathered quartz-bearing rock

Indeterminate; possibly quartz-rich granite or granitic pegmatite

Dark mafic rock, likely basalt

Basalt; predominantly plagioclase feldspar and pyroxene, with possible olivine and iron-titanium oxides

Snowflake Obsidian (Flower Jasper variant)

Vitreous volcanic silicate with cristobalite inclusions

Tumbled greenstone (probable serpentinite)

Serpentinite, chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), possibly with chlorite, magnetite, or talc

Tiny rounded brown mineral grain

Indeterminate; possibly iron oxide, garnet, or a weathered sulfide grain

Blue-gray tumbled stone, likely labradorite or blue-gray feldspar

Plagioclase feldspar, possibly labradorite (NaAlSi₃O₈–CaAl₂Si₂O₈)

Graphite-rich metamorphic rock (likely graphite schist)

Graphite schist; predominantly graphitic carbon (C) with mica and quartz

Tumbled green aventurine (likely)

Quartzite dominated by quartz (SiO₂), with green fuchsite mica inclusions

Obsidian

Obsidian (principally SiO2 with MgO and Fe3O4)

Tumbled green aventurine (probable)

Quartz aggregate, predominantly SiO₂, with green fuchsite mica inclusions

Blue Topaz

Al2SiO4(F,OH)2 (Aluminum silicate fluoride hydroxide)

Likely pink granite or granitic pegmatite fragment

Granite; mainly quartz (SiO₂), feldspar, and mica

Polished black stone, likely shungite

Shungite; carbon-rich mineraloid composed mainly of amorphous carbon, with silica and other minerals

Polished orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz/chalcedony with iron-oxide and other mineral inclusions; SiO₂

Rounded gray pebble, likely basalt or andesite

Fine-grained mafic to intermediate volcanic rock; commonly basalt (plagioclase ± pyroxene/olivine)

Tumbled carnelian/chalcedony (probable)

Microcrystalline quartz, SiO₂; orange-red variety commonly called carnelian

Rounded gray stone, likely quartz-rich granitic rock

Probable granite or granitic gneiss; mainly quartz, feldspar, and mica

Heliodor (Yellow Beryl) / Greenish-Yellow Beryl

Beryl (Be3Al2Si6O18)

Likely tumbled green mineral (possibly serpentine or aventurine)

Indeterminate; possibilities include serpentine-group minerals, nephrite, or green aventurine quartz

Likely yellow beryl or citrine gemstone in a ring

Provisional: beryl, Be₃Al₂(SiO₃)₆ (heliodor); alternative: quartz, SiO₂ (citrine)

Granite or granitic gneiss

Felsic granitoid, chiefly quartz, feldspar, and mica; possibly weakly foliated gneiss

Green jade or aventurine bead bracelet

Most likely nephrite jade (aggregated amphibole, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂) or green aventurine (quartz, SiO₂); exact identification requires testing

Iron Slag

Ferrous Slag (Industrial Byproduct)