A 14K gold ring features a sparkling modern brilliant cut green Russian demantoid surrounded by a bright white diamond halo (estimated total diamond weight 0.30 ct).

The demantoid – 1.23 ct (6.6 x 4.1 mm).

Marked with Soviet mid-century marks for 583 gold and maker’s mark.

The vintage shank is from the 1950s, the top is modern.

Diameter 10 mm (3/8 in.)

Ring size 7.5 (sizable)

 Russian Ural Mountains demantoids over 1 carat are rare.