Antique Art Nouveau Old Mine Cut and Single Cut Diamond 18k Gold Half Hoop Ring

-Size 10.5 and can be sized down to 6.5 at most

-Tests as 18k 

-Three old mine cut diamonds and four old single cut diamonds weigh approximately 0.75tcw J-K-L/VS2-SI1

-Maker's marks CM 

-4.5mm wide at face

-3.8mm rise from finger

-1.4mm wide at back of band 

#443