Sunstone oligoclase ct.6.35

Sunstone (Oligoclase) Belong to the Feldspars group with formula Na(90-70%) Ca(10-30%) (Al, Si)AlSi2 O8, a Sodium Calcium Aluminum silicate. Hardness is 6-6.5. The flashes of red color are caused by hematite platelets inclusions. This material comes from Arusha region, Tanzania; compared with Indian stones, shows bigger hematite crystals and generally is more transparent with a slights green tone. Size:14.5x10x7.8 mm. Weight: 6.35 ct. CODE#1828