Crystallized turquoise is for some reason a true rarity in nature and occurs only at a very few localities worldwide. This one, in Virginia, is the most famous of them. While the crystals individually are sub-mm, this piece overall has an incredibly rich and pristine coverage area that is loaded with them, making it an important specimen. This is an old, defunct occurrence now. We have had few examples of such size. This one is ex Robert Whitmore collection. Joe Budd photos