Mineral (Synthetic Glass)

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)

Milky Quartz

Silicon dioxide (SiO2)

Quartz (specifically Milky or Clear Quartz fragment)

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 (Clear Quartz/Rock Crystal)

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)

Snowflake Obsidian

Spherulitic Obsidian (SiO2 + impurities)

Snowflake Obsidian

Volcanic glass containing Spherulites (SiO2)

Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Milky Quartz

Silicon Dioxide (SiO2)

Banded Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Limonite

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)

Druzzy Quartz on Matrix

Silicon Dioxide (SiO2)

Quartz Vein in Schist

Quartz (SiO2) in Mica Schist

Obsidian (in jewelry setting)

Volcanic Glass (Amorphous Silica)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

Quartz Pebble (Chert/Chalcedony)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Smoky/Grey variety)

Silicon Dioxide (SiO2)

Milky Quartz/Clear Quartz Cluster

Silicon Dioxide (SiO2)