Gold lapis lazuli and diamond signet style ring 1970s

An 18k yellow gold lapis lazuli and diamond signet style ring - a rounded square flat panel of imperial blue lapis surrounded by a single row of 24 brilliant cut diamonds - total weight of ring 23.38grms - total weight of diamonds 0.96ct  - dimensions of face 21 x 21mm - current ring size P (USA 7 1/2) - due to design, limited resizing available, please enquire to resize - c.1970 USA