Great for the species! Unique, big graphite crystals from classic USA locality. Superb crystals are etched from calcite giving great contrast. Crystals size up to 2.5 cm. Good form and luster, deep black color. Such big graphite crystals are known from very few places on the planet. This specimens were collected by prof. John Jaszczak – famous mineralogist specializing in graphite. Top for the species.