10k Yellow Gold Ethiopian Opal and Diamond Princess Diana Pear Halo Stud Earrings (1/5cttw, H-I Color, I1-I2 Clarity) Fine and fabulous these studs are 7x5mm natural oval 0.55cctw Ethiopian Opal enclosed in a classic halo of 1mm round 0.2cctw natural diamond. Set using porongs setting in 1.25g 10k yellow gold with friction post backing. All our diamond suppliers confirm that they comply with the Kimberley Process to ensure that their diamonds are conflict free Imported All our diamond suppliers confirm that they comply with the Kimberley Process to ensure that their diamonds are conflict free.