Herkimer Diamond Pendant - Shape: Rough Stone Description of the Herkimer Diamond Pendant in the shape of a rough stone The Herkimer diamond, despite its name, is a unique variety of rock crystal belonging to the quartz family. They are small, bright, translucent, full of sparkle and have natural facets. It is this particular appearance that has earned it the name of “diamond”. However, it can have different aspects: opaque, with air bubbles or black carbon inclusions. The Herkimer diamond pendant in rough stone is made with a high quality and resistant stone, chosen in detail by our teams. Herkimer diamonds were found for the first time in the province of Herkimer, in the state of New York (USA), and come only from this deposit. Herkimer's diamond is more powerful than other quartz because it has properties very similar to rock crystal, with more concentrated energy.