Marquise opal Diamond StudsThe Marquise opal and Diamond Studs are feature marquise cut blue toned Australian opals and round white diamonds in a refined setting. Hand crafted in solid 14 karat yellow gold, Each stud is secured with a butterfly backing. Solid 14 karat gold 0. 65 Australian opals ct weight total Approx 7 mm length Secured with butterfly backings Fade to Black ensures that all stones are sourced from ethical suppliers with whom we have trusted partnerships. All