Quinn Cobalt Blue Teardrop Natural Stone Necklace on a Gold Chain. This striking beauty of a Cobalt Stone is 1.75" tall x 1" wide and will definitely make a statement and hangs at 18" long. This necklace is great for that special pop of trendy color. Stone is brighter in person. Looks fab paired with a flannel plaid blouse or with a deep v-neck sweater! Swoon!