Pietersite

Pietersite Rock Professor Image

Pietersite is a variety of Chalcedony with embedded fibers of amphibole minerals. The fibers cause the chatoyancy similar to that seen in tiger's eye but it is a different mineral.

Species: variety of chalcedony ♦ Chemistry: silicon dioxide ♦ Color: blue-gray, brown and yellow colors ♦ Localities: China and Namibia.