So how to master the methods of appreciation of lingbi stone grade order?
那么如何掌握鉴赏灵璧石的品位等次的方法呢？
The above three criteria, is the first standard of identifying lingbi stone authenticity.
以上三条标准，就是辨别灵璧石真伪的首要标准。
Lingbi stone is a limestone, tonal, mainly black decorative pattern on the surface always.
灵璧石为石灰岩的一种，色调主要以黑色为主，在表面常有花纹。
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