Not known Details About Crystal
These crystals had been fashioned more than 1,000,000 several years ago In the Earth's crust. They occur if the liquid within the Earth consolidates as well as the temperature chills. Other crystals type when the liquid can make its way through the clefts and dispense minerals in to the clefts.③、粗抛光：是将模具压出之毛胚，以金�