Fine Jewels
拍品 427:
Set with an oval-cut color-change sapphire weighing 30.63 carats, within a pavé- set with brilliant-cut diamond surround, gallery and hoop, mounted in 18k white gold, ring size 6
Accompanied by a report from the Gemological Institute of America, stating that the 30.63 carat natural sapphire shows color changing from dark blue to purple, originates from East Africa and has no indications of heating, report no. 5141629088, dated 19th April 2012
Accompanied by a report from the Gemresearch SwissLab, stating that the 30.63 carat natural sapphire shows color changing in different lights: violetish-blue in daylight to purple in incandescent light, originates from Tanzania and has no indication of thermal treatment, report no. GRS2010-101085, dated 4th October 2010
