This 18k yellow gold Kimberly McDonald boulder opal and diamond ring is a mesmerising piece from the fine jewellery designer who follows a mantra of ‘nothing is better than nature’. Skillfully handmade in the US, this ring has been elegantly crafted from 18k yellow gold and showcases a striking boulder opal stone surrounded by irregular-cut white diamonds. Extremely unique, this hypnotic investment piece is guaranteed to garner attention.