For the main component of natural glass and man-made glass is silicon dioxide, and both of them have no defined crystal structure, it is hard to distinguish from each other.
由于天然玻璃和人造玻璃的主要成分都是二氧化硅，且都是无内部固定结构的材料，使得二者难以区别。
For the main component of natural glass and man-made glass is silicon dioxide, and both of them have no defined crystal structure, it is hard to distinguish from each other.
由于天然玻璃和人造玻璃的主要成分都是二氧化硅，且都是无内部固定结构的材料，使得二者难以区别。
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