centrally set with oval solid Opal of 1.50ct approx (10mm x 7.5mm)
featuring great play of colors (red, green, yellow, blue, violet)
 
surrounded by 15 old-European cut diamonds of 0.30ct in total approx. 
of good color & clarity
 
in 18K Yellow Gold & Platinum 
 
English hallmarks: London, circa 1916
 
Total item’s weight: 5.2gr. 
 
Ring’s size: P (can be re-sized)