The 26-carat "D" internally flawless diamond will light up a room, if not a life or two, with its elongated, antique cushion-like Ashoka-cut, which captures and splays light with fiery brilliance.

The shooting star-inspired platinum and diamond design, anchored by an enormous internally flawless emerald-cut diamond of more than 18 carats (which can be removed to be worn as a ring), was one ...