Colombo, Sri Lanka
October 5, 2014 11:54pm CST
This gem is a cyan colored stone that comes from Sri Lanka. It boasts an unusually complex formula consisting of calcium, magnesium, aluminum, silicon, boron and oxygen. So far there exist only three faceted (cut) specimens of 0.35 carats, 0.55 carats and 0.56 carats. The first two were discovered by rare stone specialist D. P. Gunasekera and purchased by the late Prof. E. J. Gübelin of Switzerland. The smallest was sold for about $14,300.00 per carat.