Mineral And Glass

Likely rough quartz-rich rock (identification uncertain)

Possibly milky quartz with iron-oxide staining; exact identification is not possible from the image alone.

Tumbled quartz crystal

Quartz (silicon dioxide, SiO₂)

Tumbled gray stone, likely quartz-rich pebble

Probable microcrystalline quartz/chalcedony (SiO₂), possibly gray jasper or quartzite

Likely translucent quartz/chalcedony fragment

Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz

Tumbled rose quartz (probable)

Quartz, silicon dioxide (SiO₂), pink variety

Red Quartz (Tumbled)

Silicon Dioxide with Iron Oxide inclusions (SiO2)

Quartz Mineral

Silicon dioxide (SiO2)

Polished black gemstone, likely obsidian

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

Pale green translucent mineral fragment

Indeterminate; possibly fluorite, calcite, or glassy quartz

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Small tumbled pebble (likely quartz or feldspar)

Indeterminate; probable quartz (SiO₂) or feldspar

Green glass sphere/marble

Soda-lime glass (primarily SiO2, Na2O, CaO)

Prasiolite (Green Quartz) / Sea Glass Amalgam

SiO2 (Silicon Dioxide)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Opalite

Man-made glass (traditionally simulated Opal)

Quartz (specifically Milky or Clear Quartz fragment)

Silicon Dioxide (SiO2)

Quartz crystal fragment (likely milky/inclusion-rich quartz)

Quartz, silicon dioxide (SiO₂)

Clear Quartz (Tumbled)

Silicon Dioxide (SiO2)

Snowflake Obsidian

Volcanic Glass with Spherulitic Cristobalite (SiO2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Green glassy gemstone-like specimen

Likely synthetic glass or treated quartz; exact identification requires testing

Sea Glass

Silica (SiO2) - Amorphous

Sea Glass

Amorphous silicon dioxide (glass)

Sea Glass

Man-made vitreous material (silica-based glass)

Tumbled blue glassy mineral, possibly sodalite or blue aventurine

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

Opalite Egg

Synthetic Glass (Simulated Opal)

Yellow Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Blue glassy mineral specimen, possibly dyed or synthetic

Uncertain; possible blue fluorite (CaF₂), dyed chalcedony, or man-made glass

Slag Glass

Amorphous Silica / Glass Slag

Polished pink quartz pebble, likely rose quartz

Quartz, silicon dioxide (SiO₂), with trace iron, titanium, or manganese

Microcline Feldspar

KAlSi3O8

Milky quartz cluster

Quartz, silicon dioxide (SiO₂)

Obsidian

Volcanic glass

Blue glassy mineral fragment, possibly dyed/cobalt-colored calcite or aragonite

Uncertain from image; vivid blue coloration may indicate treated calcite (CaCO₃), aragonite (CaCO₃), or synthetic glass

Obsidian

Volcanic Glass (SiO2 - Silicon Dioxide with impurities)

Tumbled milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Clear quartz fragment

Quartz (silicon dioxide, SiO₂)

Muscovite Mica (with Quartz matrix)

Muscovite - KAl2(AlSi3O10)(OH)2

Mica Specimen (Schist / Muscovite)

Muscovite / Biotite Mica (KAl2(AlSi3O10)(F,OH)2)

Goldstone (Red)

Aventurine Glass