Quartzite Value, Price, and Jewelry Information

Quartzite (Sioux Quartzite, Paleoproterozoic, 1.65 to 1.70 Ga; Sioux Falls area, city of Sioux Falls, Transcontinental Arch, southeastern South Dakota, USA) by James St. John, on Flickr

Quartzite

Quartzite Information

Data Value
Name Quartzite
Is a Variety of Quartz
Varieties Aventurine
Colors Usually white or grey, sometimes pink, red, brown.
Luster Greasy to waxy.
Hardness 7
Fracture Conchoidal to uneven, Granular in aggregates
Specific Gravity 2.64-2.69
Cleavage None or indistinct
Transparency Opaque.
Phenomena Aventurescence.

Comments

 A rock made up of tightly packed quartz grains, formed at high temperature and pressure, due to metamorphism. Sometimes it contains small crystals that reflect light, and this material is called aventurine. Usually the included crystals are green, chrome-rich mica called fuchsite. Other micas that may form aventurine include gray varieties or brown types (from Chile). The density is usually 2.64-2.69. Occurrence: Spain; USSR; India; Chile.

Stone Sizes

Quartzite and milky quartz are massive varieties available in large pieces.