A colour-change sapphire and diamond ring
The oval cabochon colour-change sapphire, weighing approximately 17.20 carats, in a collet mount between tapered baguette-cut diamond shoulders, finger size N½
Accompanied by report no. GRS2013-020649T from Gem Research swisslab (GRS), dated 2nd March 2013, stating that the sapphire colour changes from violetish-blue (daylight) to purple (incandescent) and no indication of thermal treatment was observed.
A colour-change sapphire and diamond ring
The oval cabochon colour-change sapphire, weighing approximately 17.20 carats, in a collet mount between tapered baguette-cut diamond shoulders, finger size N½
Accompanied by report no. GRS2013-020649T from Gem Research swisslab (GRS), dated 2nd March 2013, stating that the sapphire colour changes from violetish-blue (daylight) to purple (incandescent) and no indication of thermal treatment was observed.
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