Quartzite is a compact, coarse-grained, silica-rich metamorphic rock used for ornamental purposes. It can be dyed to imitate other materials. The best-known variety of quartzite is aventurine quartz. Aventurine quartz is quartzite with mica platelet inclusions. Red quartzite gets its color from iron oxide mineral inclusions.
- Optical Properties
- Characteristic Physical Properties
- Chemistry & Crystallography
Color may be due to chromium or nickel salts. A colorless quartzite is dyed to simulate the green aventurine. The single vague narrow line at 630nm. and little transmission beyond 630nm. suggests the color here is due to nickel
We acknowledge the significant scientific contributions of John S Harris, FGA to the study of gemstone spectra and with deep appreciation to him, acknowledges the use of his images and related notes about gemstones and their spectra in the educational materials on this website.
Countries of Origin
Canada; Colombia; Argentina; Unknown; China; Brazil; Mexico; Peru; India
Normal care for untreated stones. Avoid harsh chemicals, ultrasonic cleaners, and steaming for dyed and impregnated stones.