Chemical formula: SiO2, belongs to the six party system, hardness: 2.6, specific gravity: 2.6, refractive index: 1.54 - 1.55.

The first historical reference to use crystal from the ancient ancient Sumerian, including the magic formula in crystal.

Good things are often easy to be destroyed, then do a good job of crystal trophy maintenance is very necessary.

Said China daily glass association chairman Meng Lingyan 20 in Zhejiang County of Pujiang at the fifth session of Chinese crystal and glass products exhibition, after years of development, Zhejiang County of Pujiang has become one of China's larger crystal glass products production base.

Jinhua news network November 2nd News - reporter Zhou Langming reported group of Hong Jianjian