Man Made Glass Mineral Simulant

Granite / Quartz Vein Rock

Granitoid with Quartz (SiO2)

Obsidian

Obsidian (Volcanic Glass, primarily SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Green Aventurine

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

Green Aventurine

Aventurine Quartz (SiO2 + Fuchsite mica)

Aventurine (Green Quartz)

Quartz with Fuchsite inclusions (SiO2 with K(Al,Cr)2(AlSi3O10)(OH)2)

Obsidian

Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Quartz (specifically Milky or Clear Quartz fragment)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Amethyst (Rose-tinted variation)

Silicon Dioxide (SiO2) with trace iron impurities

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Smoky variety on matrix)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (specifically Clear Quartz with iron/hematite staining)

Silicon Dioxide (SiO2)

Quartz Vein in Siltstone

SiO2 (Quartz) on clastic sedimentary matrix

Clear Quartz Cluster

Silicon Dioxide (SiO2)

Quartz Druzy on Matrix (with Copper Mineralization)

Silicon Dioxide (SiO2) with Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Agate (specifically, multi-colored or pastel-dyed agate)

Silicon dioxide (SiO2) - specifically, a cryptocrystalline variety of quartz known as Chalcedony, with banding classified as Agate. (If it were Fluorite, the chemical formula would be Calcium Fluoride - CaF2).

Snowflake Obsidian

Spherulitic Obsidian (SiO2 + impurities)

Snowflake Obsidian

Volcanic glass containing Spherulites (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Banded Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Limonite

Silicon Dioxide (SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Quartz Crystal Point

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky/Gold-stained)

Silicon Dioxide (SiO2)

Quartz with inclusions (likely Tourmaline or Biotite)

Silicon Dioxide (SiO2)

Sapphire (Raw/Rough)

Corundum (Al2O3)

Yellow Quartz (Citrinated Quartz)

Silicon Dioxide (SiO2)

Fluorite

Calcium Fluoride (CaF2)

Quartz Vein in Schist

Quartz (SiO2) in Mica Schist

Druzzy Quartz on Matrix

Silicon Dioxide (SiO2)

Milky Quartz (with trace inclusions)

Silicon Dioxide (SiO2)

Ferruginous Quartz (Iron-stained Quartz)

Quartz with Iron Oxide inclusions (SiO2 with Fe2O3)

Obsidian (in jewelry setting)

Volcanic Glass (Amorphous Silica)