The cushion cut sapphire is set with 18K yellow gold double prongs in a platinum ring mounting with baguette diamond side stones. The GRS describes the sapphire as having Sri Lankan origin with indications of heating.
Metal: Platinum & 18K Yellow Gold
Gemstone: Sapphire: 15.14 carats. GRS Report #GRS2012-021300
Gemstone: Diamonds: ~1.30 carats
Design Era: Contemporary
Ring Size: 5.5 with ring guard, Resizable