Turquoise Hōkū Naupaka RingThis 925 sterling silver ring features half of our original Hk, or star, motif split between two rings, which can be purchased as a Naupaka (matching) set. Price is per piece. The engraving on this piece was done entirely by hand. As part of a set, one ring is always 8mm in width and the other is 6mm in width. For the set to match, you must purchase a left ring and a right ring. Hk, or stars, were used by the ancient Hawaiians as a navigation tool