Shop › Ruby & Spinel Eternity Ring Image 1 of 4 Image 2 of 4 Image 3 of 4 Image 4 of 4 Ruby & Spinel Eternity Ring $250.00 sold out Vintage round-cut ruby and synthetic white spinel eternity ring. M&B Maker, 9 375. In fantastic vintage condition. Size M. Sold Out Added! Vintage round-cut ruby and synthetic white spinel eternity ring. M&B Maker, 9 375. In fantastic vintage condition. Size M.