Man Made Glass Mineral Simulant

Snowflake Obsidian

Volcanic Glass with Spherulitic Cristobalite Inclusion

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Quartz Crystal Cluster in Matrix

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Grain)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Possible tektite or volcanic glass specimen

Natural silica glass; composition commonly near SiO₂, but exact identification requires chemical testing

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Green Aventurine

Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Rough Quartz (Milky / Clear Quartz)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Smoky quartz fragment

Quartz, silicon dioxide (SiO₂), smoky variety

Lepidolite

K(Li,Al)3(Al,Si,IV)4O10(F,OH)2

Pegmatite (Quartz with Tourmaline/Biotite inclusions)

Igneous Pegmatite

Celestine (or Celestite) on Matrix

Celestine (SrSO4)

Pink Orthoclase Feldspar with Dendrites

Orthoclase (KAlSi3O8) with Manganese Oxide dendrites

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz with Chlorite/Mica inclusions

Silicon Dioxide (SiO2) with phyllosilicate inclusions

Greasy Quartz (likely carved Milky Quartz or Aventurine)

Silicon Dioxide (SiO2)

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz Pebble with Chert

Silicon Dioxide (SiO2)

Sedimentary Sandstone with Iron Oxide

Ferruginous Sandstone

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(OH)2

Sandstone

Arenite (primarily SiO2 with various cementing agents)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Quartz / Clear Quartz

Silicon Dioxide (SiO2)

Milky quartz with iron staining

Quartz, silicon dioxide (SiO₂)

Quartz crystal point (likely smoky or iron-stained quartz)

Quartz, silicon dioxide (SiO₂)

Green Aventurine

Aventurine Quartz (SiO2 + Fuchsite inclusions)