Herkimer Diamonds from Herkimer County, NY. Herkimer Diamonds are the ultimate high vibrational healing stone, known for their clarity and brilliance. A great magnifier of energy and harnesses pure light energy. A crystal known for tapping into astral realms, connecting to your guides, accessing higher knowledge, and assisting your intuition and gifts. This specimen is A grade and the entire matrix is covered with tiny little herkimer diamonds and it has a very large main herkimer diamond and a few other moderately sized herkimers hidden in the various caves.