"Light of the Desert", the world's largest faceted Cerussite gem carats), Royal Ontario Museum. Cerussite is one of the only gems with adamantine (diamond-like) luster. Very fragile. ITS THE ARKENSTONE!
Le plus gros diamant jaune vendu 8 millions d'euros
Although an attractive shape in its own right, this cut is more often used for accent stones in this day and age - as the fashion in modern times is for central stones to optimize "light performance" - such as the round brilliant cut.