Key Characteristics & Properties
Composition: A variety of quartz (SiO₂) in the trigonal crystal system, colored by natural iron inclusions and irradiation.
Hardness: Rates a 7 on the Mohs scale, though the tiny surface crystals require protection from heavy knocks or abrasion.
Common Origins: Sourced primarily from Brazil, Uruguay, Madagascar, and Namibia.
4.5" Long
4" Wide