Crystal, in ancient times, was called water jade or water spirit. Its main chemical component is silica.

However, not all silica crystals can be called crystals.

In fact, the crystalline molds of silica are very finely divided.

When the silica crystal is perfect, it is called crystal, and when it is imperfect, it is quartz, and after gelatinization and dehydration, it enters the area of agate, and if the silica contains water......

Chapter 81 of "Miao Yin Hand", cliff distress is in the middle of the hand, please wait a moment,

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