RAREST Herkimer Diamond — 15.10 carats Exceptional clarity - NO RESERVE PRICE - Height: 18.6 mm - Width: 13.8 mm- 3.02 g - (1)

Herkimer diamonds are distinctive double-terminated quartz crystals found primarily in Herkimer County, New York. Despite the name, they are not true diamonds but quartz crystals of exceptional clarity and natural faceting. Weighing 15.10 carats, this rare Herkimer diamond features outstanding transparency and well-formed terminations, characteristics highly sought after by mineral collectors and crystal enthusiasts. These crystals are famed for their natural faceting and often occur as doubly terminated points, meaning they have crystal faces on both ends, making them unique compared to typical quartz. Collectors prize specimens like this for their aesthetic appeal and geological significance.