Antique art popular deco green jade marcasite sterling silver ring

This is a very beautiful popular, vintage and unique ART DECO JADE MARCASITE STERLING SILVER c. 1920 ring size 6 (weight 5.7g). The ring has a marvelous green jade (14 x 10 mm), oval top shape (top measures 1 3/16" x 3/4") with marcasite decoration and sterling silver. The ring is in very good condition.
0.7 BR