A 3-stone ring with sleek lines, a stately and serene mint green tourmaline, and open side windows for maximum play of light.

• 8 mm Asscher-cut light blue-green tourmaline, 2.81 cts, heated, Afghanistan

• 4 mm rounded trillion lab-created diamonds, 0.44 tcw, F/VS

• softly-sculpted, wide-bottomed Euro shank

• 950 platinum

• size 7.5