A Vintage Plum Sapphire and Diamond Platinum Engagement Ring

c. 1915

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)