1.72ctw Rectangular Octagonal London Blue Topaz With 0.13ctw Round White Zircon Rhodium Over Sterling Silver Ring. Measures Approximately 0.35"L x 0.59"W. Not sizeable. Accent stones primarily zircon. London Blue Topaz, London Blue, Sterling Silver Ring, Blue Topaz, Silver Ring, Topaz, Sterling Silver Rings, Silver Rings, London