Composition: Sodium-calcium aluminum silicate
Nomenclature: Named after the reddish reflection produced when the stone is turned in the light.
Industrial Uses: Gemstone.
Additional Notes: A gem variety of oligoclase, a member of the Feldspar group of minerals. Sunstone contains minute, aligned plates of hematite that produce a spangled, reddish reflection when the stone is turned.
Malawi : Scott 371 : 10 tambala : 20 Aug 1980
Sunstone (oligoclase feldspar)