18K Yellow Gold and Platinum "Agnes" Three Stone Ring featuring a 2.73 ct Old Mine Cut Diamond Center

18K Yellow Gold and Platinum "Agnes" Three Stone Ring by Single Stone featuring a 2.73 ct Old Mine Cut Diamond Center (K, VS1 GIA 5231577023) and a 0.91ct Old Mine Cut Diamond (I, SI2 GIA 5222794083) and a 0.90ct Old Mine Cut Diamond (J, I1 GIA 5221794082) with a mix of Old European Cut and Round Brilliant Cut Diamonds on the Band. Size 6.5. Reference No.: 05-05121