Herkimer Diamonds are very powerful Quartz crystals. They are capable of both transmitting their own energies AND receiving spiritual energy. Being double terminated, they can intensely amplify and focus these energies. Herkimer Diamonds are one of the strongest Quartz on the hardness scale, so they posses the power and endurance to work through difficulties beyond the capabilities of other Quartz crystals. Herkimer Diamonds may be small, but they easily make up for this in their universal vibrations!