Very Large Checkerboard Aquamarine. Photo Bonhams.

Sure to become a statement piece if mounted as a pendant, this attractive aquamarine, most likely from Brazil, displays a rich blue unenhanced color, made all the more beautiful by its checkerboard faceting and fine luster. Weighing approximately 243.0 carats and measuring 30.0 x 25.0 x 19.0mm. Sold for US$ 23,750 (€17,751)

Bonhams. Gems, Minerals and Lapidary Works of Art New York - 23 May 2012