Ananya Lotus earrings in 18K white gold with 10.42 carats pink opal, and 0.55 carats diamond, $5,000, ananya.com Arman Sarkisyan Arman Sarkisyan earrings in 22K gold and silver with 6.04 carats ...

Suspected of being a cursed gemstone, the opal is a rare choice for many a tiara wearer. Not so for Princess Marie of Denmark whose disbelief was evident in her choice of striking white opal diadem ...