Quick view Choose Options Sterling Silver Om (Aum) Mantra Oval Amethyst Cabochon Yoga Ring Sterling Silver Om Mantra Oval Cabochon Purple Amethyst February Birthstone Yoga Ring. Metal: 925 Sterling silver. Top width: 0.70" (18mm). Bottom band width: 0.13" (3.3mm). Weight: 7.5 g... MSRP: $150.00 $89.99 Choose Options Compare