Boulder opals all have different shapes, so the design often resembles artisan pieces, as craftsmen usually craft them by hand to fit the stone. This opal has a gradient of navy blue with fluorescent green and blue that shines in diagonal lines. Small diamonds and emeralds add a touch of elegance around it. Markings: K18WG 3.25 (Opal) E 0.07 (Emerald) D 0.09 (Diamond) As this is a pre-owned item, please refrain from purchasing if you are sensitive to such things. 27-00. Ring Size: Size 12 Stone: Diamond