Mineral And Glass

Quartz with Associated Minerals

Silicon Dioxide (SiO2)

Opalite

Synthetic Opalite (Man-made glass)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Quartz in Host Rock

Silicon Dioxide (SiO2)

Quartz with Iron Staining

Silicon Dioxide (SiO2)

Tumbled quartz or calcite specimen

Quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing

Small white mineral fragment

Indeterminate; possibly quartz, calcite, or feldspar

Quartz Mineral

Silicon Dioxide (SiO2)

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Quartz

Silicon Dioxide (SiO2)

Green sea glass (likely bottle glass)

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

Tumbled green aventurine (probable)

Quartz variety: aventurine quartz, SiO₂, colored commonly by fuchsite mica

Black glassy fragment, likely obsidian or industrial glass

Volcanic glass (obsidian), chiefly amorphous SiO₂; identification uncertain from image

Snowflake Obsidian

Obsidian with Cristobalite inclusions (SiO2)

Mica (Muscovite)

Muscovite (KAl2(AlSi3O10)(OH)2)

Muscovite Mica in Quartz Matrix

Muscovite (KAl2(AlSi3O10)(OH)2) in Quartz (SiO2)

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(OH)2

Polished mahogany obsidian

Volcanic glass; rhyolitic obsidian, commonly with iron-oxide coloration

Small gray translucent stone, possibly quartz or glassy mineral

Uncertain; likely microcrystalline quartz (SiO₂), but the image is insufficient for definitive identification

Fluorite and Mineral Collection

Calcium Fluoride (CaF2)

Tumbled black stone, likely black obsidian

Obsidian — natural volcanic glass, predominantly silica-rich rhyolitic composition

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Feldspar

Triclinic or Monoclinic Tectosilicate (e.g., KAlSi3O8)

Borosilicate Glass (Manufactured)

SiO2 + B2O3 (Silicon dioxide and Boron trioxide)

Snowflake Obsidian

Obsidian with Spherulitic Cristobalite (SiO2)

Snowflake obsidian

Volcanic glass (obsidian), chiefly silica-rich rhyolitic composition, with cristobalite or feldspar spherulites

Milky Quartz with inclusions

Silicon Dioxide (SiO2)

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

Pink potassium feldspar (orthoclase/microcline)

KAlSi₃O₈; likely massive potassium feldspar, possibly with quartz

Snowflake Obsidian

Volcanic Glass with Cristobalite Inclusions

Milky quartz (likely rough quartz crystal)

Quartz, silicon dioxide (SiO₂)

Goldstone and pink quartz bead strands

Goldstone is aventurescent copper-bearing glass; pink beads are likely rose quartz (SiO₂), though dyed or glass imitations are possible

Obsidian

Volcanic Glass

Green glassy stone, possibly aventurine or green jade

Unidentifiable from the image; possible quartz-rich aventurine (SiO₂) or jadeite/nephrite

Clear Quartz

Silicon dioxide (SiO2)

Opalite (likely man-made glass)

Opalite; amorphous silica glass, not a natural mineral

Likely clear quartz crystal (possibly cut/polished quartz or glass imitation)

Quartz, silicon dioxide (SiO₂)

Likely quartz or quartz-rich pebble

Quartz (SiO₂), possibly milky quartz or a small quartzite fragment

Quartz (Clear Quartz)

Silicon Dioxide (SiO2)

Sea Glass (Frosted Quartz/Glass)

Amorphous Silicon Dioxide (SiO2)

Orthoclase Feldspar (Granitic)

KAlSi3O8 (Potassium Feldspar)

Opalite

Synthetic Glass (Simulated Opal)