22K Yellow Gold Necklace & Earrings Set W/ Black Sapphires 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 necklace is 17 inches long with a width range of 2.25-19 mm. Each fanned earring is 33 mm long and 30 mm wide. This exquisite set, ideal for formal affairs, has a total gold weight of 78.9 grams.