Michael Christoff signed 18k white gold diamond and tanzanite dome shaped ring set with approx 3.00 ctw of diamonds and a good color natural tanzanite that is a little less than 1 carat. . Ring size - 9.5, ring top is 20mm wide. Marked: M. Christoff, D0.54, D2.42. Weight - 17.3 grams. in good condition.Note: there are several hundred brilliant cut diamonds surrounding the central stone which are actually set in a raised vine motif that trails down each side of the ring, it is hard to see because of the diamonds reflections and sparkle...very cool ring that retailed for almost $30,000. Please copy link in browser to see video. https://youtu.be/vpwm7Rycb5E