How to identify the “forward and reverse grains” of jadeite?

The natural texture of jade is academically defined as the structure of rock. It refers to the texture formed by the bonding surfaces between the crystals that make up jade, or the texture formed when one mineral fills the gaps between crystals of another type during the formation of jade.

Naturally formed lines will not affect the price of jade. It is also one of the signs of jade's natural growth and one of the criteria for determining its authenticity. The natural patterns on jade are formed when the jadeite raw stone is under high pressure in the earth's crust. Natural jade patterns are mostly columnar minerals that grow along the direction of minimum pressure.

Everything in nature follows its own rules. The most common choice is “go downstream or go upstream”. Between the two, we will definitely choose go downstream, because it will be easier to reach the destination with the wind and the water. In jadeite, there is also a distinction between "forward grain" and "reverse grain". More importantly, this directly affects the value of the entire jade.

The academic definition of jade texture is as follows: the structure of rock. To put it in plain words, the texture refers to the direction of the long axis of the jadeite crystals. Why does it have to do with the direction of the long columns?

This is because jadeite raw stone is formed under high pressure in the earth's crust, and most of the columnar minerals will grow in the direction of the least pressure. It's like a small grass growing between two big rocks. It will grow out from the cracks between the rocks.

fruit

fcgc33