18k Diamond and Sapphire Earrings For Sale at 1stDibs Enchanting Emerald Cut Sapphire and Diamond Earrings For Sale at 1stDibs An impressive pair of sapphire and diamond earrings ??? Vintage Tom Sapphire and Diamond Earrings For Sale at 1stDibs. A pair of 18 carat gold earrings*. Set with a dark blue oval cut sapphire 6x4mm, claw set. Above each, three small white diamonds, overall size 9x4. 6mm, weight each 1 gram. *just under weight for an official hallmark, test as 18 carat gold. Cleaned in our ultrasonic cleaner for ultimate safety.