Large Art Deco Aquamarine Ring. Dive into this refreshing pastel blue swimming pool size 49.86 carat (!) Aquamarine. In addition to the copious size and soothing color, the Aqua is superbly cut, à la a vintage Harry Winston style diamond with wide cut corners. The extraordinary mounting, which, due to the size of the Aqua, can only be appreciated from the sides, exhibits consummate Art Deco geometry including a cool Greek-key variation on the gallery.