A Vintage Plum Sapphire and Diamond Platinum Engagement Ring
The milgran platinum ring features a 5.41 ct natural sapphire with an unusually bluish-purple color.
The sapphire is framed by 16 sparkling old European cut diamonds (I-J color, VS2-SI2 clarity).
The shoulders of the ring are set with six old rose cut diamonds.
Estimated total diamond weight 1.70 ct
The ring is marked with a later Russian assay mark for 950 platinum.
Size of the cluster 20 x 17 mm (6/8 x 11/16 in.)
Ring size 7 1/2 (18 mm)