These genuine Sapphires and Pearls are strung on a 14K white gold, very fine rolo chain. The centerpiece stone is also a sapphire - and yellow. All these sapphires are completely natural, meaning they have not been heat treated or chemically treated, as most sapphires are on the market today, to alter color. Natural stones are extremely rare to find these days, but they are available when you look in the right places!