Vintage Arthur King Black Opal Diamond Ring

Centering an oval opal measuring approx. 21 x 16.3 mm, in an organic sculptural mounting scattered with seven square sapphires ranging from approx. 2.5x2.5mm to 3.6x3mm. Also set with twenty Single cut diamonds weighing approx. 0.30ctw, fashioned in 18k white and yellow gold. Signed "KING". Stamped "18K". Size 7 1/4.