Crystal Agate &reg;Real Herkimer Diamond Quartz Dt Crystal Genuine USA (8-15ct)attunement-1pc Real Herkimer Diamond Quartz DT Crystal Genuine USA (8-15ct)ATTUNEMENT-1pc Stone Types: Herkimer Diamond Stimulates psychic gifts. Brings in pure light and is used to clear the Chakras. Considered to be an 'attunement' stone.