Ursa Marquise Twist Engagement RingThe 'Ursa' diamond engagement ring is a rare 1 1 limited edition ring design, created from 100% ethical materials. This is the only example of the ring design. The unique design blends the traditional solitaire engagement ring, styled with a CanadaMark natural 0. 76 carat Marquise diamond, graded E colour and SI1 clarity. The diamond has been tracked from the mine to the polished diamond and features the Canadamark number (CM 294851) laser inscribed