1.9 x 1.2 x 1.2 cm, 1.9 x 1.2 x 0.8 cm, 1.8 x 0.8 x 0.7 cm, 1.4 x 0.7 x 0.7 cm, 1.4 x 1.2 x 1.2 cm, 1.2 x 0.7 x 0.7 cm, 0.9 x 0.6 x 0.5 cm. A set of 7 superb floater quartz crystals from Herkimer, New York - known as "Herkimer Diamonds" for their incredible gem-like quality, unique in the world. They contain natural inclusions of dark bituminous. These are found by laboriously opening pockets in large, very hard boulders.