Good jadeite must have both good appearance and good quality.

Jadeite Grading

"Outsiders look at the color, insiders look at the type"

The texture of jade is also called the type of jade or water head. For jade, texture is one of the important factors that determine its value, which is comparable to the life of jade.

"Type" refers to texture, which is evaluated based on the coarseness of the particles. It involves the specific performance of certain jade jewelry in terms of beauty (luster), durability (hardness, toughness), and rarity.

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Species Difference

The finer the grains, the older the jade. For good quality jadeite, the particles must not only be fine but also uniform, with uniform particle size, and not large or small. In this way, when light shines into the jadeite, it absorbs less and reflects more, which will make the jadeite more lustrous. Just like the reason why diamonds are so brilliant is because their particles are very, very fine. The finer the jadeite particles, the older it is.

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Species Difference

The quality of jade has the most direct impact on its fineness and transparency. The coarseness and fineness of the minerals directly affects the transparency and polishing smoothness of jade.

Jade texture grading and evaluation method:

Z1——Extremely fine grains, with a very fine and dense structure and uniform and small particle size.

Under a ten-fold magnifying glass, the grain size, corresponding primary cracks, cracks filled with secondary minerals, etc. are not visible. The particle size is less than 0.1mm, and most of them are fibrous structures, and it is difficult to see the "emerald green" quality. This type of jade is commonly known as: glass ground, ice ground, and egg white ground.

Z2——fine grains, dense structure, small and uniform particle size.

Under a ten-fold magnifying glass, very few extremely small cracks and grain sizes consistent with primary cracks can be seen, but no secondary minerals filling the cracks are seen. The particle size is between 0.1mm and 1mm, with a fibrous and granular structure, and occasionally "emerald green" can be seen. This type of jade is commonly known as: ice ground, egg white ground, hibiscus ground, and washed white ground.

Z3——Medium grain, the structure is not dense enough and the grain size is uneven.

Under a ten-fold magnifying glass, tiny cracks can be seen locally, with composite primary cracks and secondary minerals filling the cracks. The particle size is between 1mm and 3mm, with a columnar granular structure and obvious "emerald properties". This type of jade is commonly known as: lotus root powder ground, water bean ground, and sand ground.

Z4 - coarse grains, loose structure, and large differences in particle size.

Cracks are visible to the naked eye, with composite primary cracks and cracks filled with secondary minerals. The particle size is greater than 3mm, presenting a columnar granular fragmentation structure, and the "emerald nature" is very obvious. This type of jade is commonly known as: bean ground, coarse sand ground, stone ground, fragrant ash ground, and lime ground.

In folk culture, "type" and "water" are often inseparable, and "water head" is also one of the common terms for jade texture in the industry, because there is a certain connection between type and water head. Generally speaking, if the quality of jade is good, the water head of jade will also be good, but the two are not absolutely related.

Plant well

Species Difference

For example, although some jades are of very good quality and the crystal grains inside the jade are very fine, the crystals inside the jade are not well combined with each other, and the bonding between the crystals is not tight, which affects the transmission of light. Therefore, the light transmittance of the entire jade will be poor, and the water head of the jade will be poor.

Good transparency

Opaque

On the contrary, there are also inferior jades. Although the crystal grains are coarse, the crystals inside the jade are well combined and the density is high, which is conducive to the transmission of light. Therefore, the jade has good light transmittance and water head.

Good opacity

Transparent

Of course, the poor quality and good quality mentioned in the article are relative terms. The quality of the quality is only one of the criteria for judging the value of jade. Good or poor quality can cause a huge difference in the value of jade, but such a gap is not absolute. Good jade must be a comprehensive assessment that integrates its type, water, color, workmanship, and flaws.

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