Quartz crystals from Herkimer County, New York, colloquially known as "Herkimer Diamonds", are known to collectors and non-collectors alike around the world for their exceptional beauty and clarity. This is a fine, jewel-like example, featuring two large, ice-clear, lustrous crystals without matrix. This is an exceptional "Herk" cluster both for the quality and the fact that it is unrepaired. Classic! Ex. Proctor Family Trust Collection.