Visit Costco.com for spectacular gemstone necklaces, and discover a rainbow of color! Our impressive inventory offers a large selection of gemstones, including fiery rubies, aquamarine, crimson garnets, lapis, and sapphires in an array of hues. We make shopping online easy, by letting you filter by desired stone, size, cut, or composition. Imagine draping your neck with a dramatic opal teardrop accented with lustrous diamonds, or a blush-colored morganite set in warm rose gold. If you’re looking for coordinating pieces, we offer an assortment of beautifulgemstone rings andearrings. Start shopping now, and see what we have in store for you!