The production base established at an elevation of ***0 meters plateau-Qinghai province, there are abundant natural yak horns, which is the best raw material to make yak horn glasses. The raw material of natural yak horn glasses and bone glasses produced by the company adopted yak horn of Qinghai plateau. The yak grows at an elevation of ***0meters plateau and it has strong vitality. It has the characteristics of cold-resistant, high temperature-resistant, and oxygen-resistant. The yak cutin has high density, hard and strong elasticity, clear texture(transparent or translucent). Green as emerald, white as pearl, it is best raw for glasses. Glasses made of yak horn have bright color, clear texture, create dignity and are high-grade nature glasses.