The Smithsonian’s National Museum of Natural History has acquired the 2.33-carat "Winston Red Diamond," as part of the “Winston Fancy Color Diamond Collection.” ...

From a Persian prince to the American “jeweler to the stars,” the world’s largest cut blue diamond has a lengthy history.

The collection features more than 1,800 carats of the most precious kind of colour: sapphires, emeralds, rubies and yellow diamonds ... and polishing some of the world’s finest yellow stones ...