COLOUR-CHANGE SAPPHIRE AND DIAMOND RING

COLOUR-CHANGE SAPPHIRE AND DIAMOND RING Oval-shaped colour-change sapphire of 11.22 carats, circular and square-cut diamonds, platinum, ring size 5¾ GIA, 2018, report no. 2274707604: 11.22 carats, Sri Lanka, no indications of heating, violet changing to purple US$20,000-30,000