Perfect Crystal crystallization crystals belong to the third party system, usually hexagonal columnar crystals, cylindrical transverse growth, cylinders for a tip or two sharp, long cylinders linked together, commonly known as Druse, beautiful and spectacular, shapes are in different poses. In addition to the usual long cylindrical external, there are Sword-shaped, if the plate, some like short columns, and some, like Double Cone. Some as small as a finger, some as big as boulders; less than half, some weighing more than 300 kilograms. Chairman Mao Zedong, the Crystal coffin of 105 mine natural white Crystal Donghai County eventually selecting high quality raw materials. By far the largest piece of Crystal was from Donghai County Lianyungang.