22K Yellow Gold with Black Sapphire Necklace & Earrings Set for women. The breathtaking 22K yellow gold necklace and earrings set is truly an elaborate display fully encrusted in precious black sapphires. The u-collar black sapphire necklace is 17 inches long with a width range of 2.25-19 mm. The fanned black sapphire earrings are 33 mm long and 30 mm wide each. This exquisite set is ideal for formal affairs and has a total gold weight of 78.9 grams.