Sterling silver herkimer diamond earrings. A Herkimer diamond is a beautiful double terminated quartz crystal that can be found in Herkimer village, New York. You may not believe this, but this gemstone is almost five hundred million years old! The Herkimer diamond is also known as the “Stone of Attunement” because it can help you attune to any situation or environment. Even if you’re in an unfamiliar territory or situation, surrounded by people you don’t know and with intentions that are unclear, the energies of the Herkimer diamond will put you at ease and guide you toward the right direction.This crystal can powerfully amplify your spiritual energy.