There are essential differences in grain shape between them. The mineral grain structure of nephrite is sugar-like, while jadeite is columnar or fibrous. Jadeite has a unique "emerald", but nephrite does not have this characteristic, so it can be judged whether jadeite is nephrite or nephrite from the reflection surface or light.

2. Gloss is the difference between jadeite and nephrite.

Gloss is one of the biggest differences between jadeite and nephrite. Anyone with a little experience can judge nephrite and jadeite by reflecting light. The surface of nephrite presents a greasy luster, which is inconsistent in strength and soft and moist, so people understand it as moist jade. The reflective luster of jadeite presents a hard glass luster, revealing a cold chill, so it is called cold water jade.

3. Difference of specific gravity

The proportion of nephrite (3.00) is slightly lower than that of jadeite (3.33).

4, the difference of refractive index

The refractive index of nephrite (1.62) is also slightly lower than that of jadeite (1.66).

Extended data

1, texture. Natural jadeite is transparent or translucent in texture, and its surface is bright and shiny. If you look closely, you can see the nearly round and slightly transparent "salt particles" and the fibrous substances around them.

2. Hardness. Natural jadeite is jadeite, and its Mohs hardness is 7 degrees. It will be carved by a sharp knife without leaving any trace. The hardness of fake jade is low, so a sharp knife can draw it out.

3. Emerald. When natural jadeite is observed under strong light, emeralds with other mineral particles can be seen, which are called Cui Hua or emeralds. Fakes made of glass, plastic and porcelain have no such "emerald" characteristics.

4. Relative density (specific gravity). Natural jadeite has a hard and dense structure, no bubbles, high density, and clear sound when knocking; Fake products have loose structure or bubbles, low density and hoarse knocking sound.

5. color. The real product is rich and pure emerald color. Some fakes are made of white jade, serpentine, Australian jade, Han Guoyu, marble and even various stones. After decoloring, it is filled with high-hardness plastic slurry and colored, or soaked in green liquid to make "colorful jade". Observing under strong light, you can see green lines, which are messy and small; Some do not show lines, but they are not clear, with poor gloss and lighter weight than the real thing.

Baidu encyclopedia-identify jadeite

Baidu encyclopedia-identify jade