In the jade market, Hetian jade, Russian jade, and Qinghai jade are the most common types of jade. At present, we can see the Russian nephrite, the main mineral composition is tremolite, less impurities. In terms of chemical composition, mineral composition, structure and appearance, it is very similar to Xinjiang Hetian jade. How to distinguish between Hetian jade and Russian materials?
From the color:
There are many kinds of Hetian seed jade skin color, and the common ones include white, blue, white, black, autumn pear, sweet-scented osmanthus, and red.
Russian seed jade skin color is relatively simple, usually white, milky white color, brown, egg yellow, sugar color and other typical colors formed in a piece of jade, and the transition from the outside to the inside is very natural, generally the outermost layer is grayish white The rest are in order of dark brown sugar and light brown sugar until the transition to pure white.
Internal structure:
The interior of the Russian jade is in a granular mosaic structure, like a pot of porridge cooked into a paste. Hetian jade: It has a fibrous structure, which is relatively uniform and dense, and is also relatively small, so the texture is very good. Qinghai jade: granule-shaped flocs, or like a lot of water lines are concentrated together to form a sense of water pool.
From the oiliness:
The ancients called Hetian jade "warm and zeal", that is, its luster has a very descriptive grease, not strong and not weak, making people look comfortable, touch the beauty. The fingering jade is named for its fat, which is very good, very moist and very precious.
The Russian material is not warm enough, the oil is poor, and it is slightly dryer than Hetian jade. The jade density is not as fine as Hetian jade. According to jade carving experts, Russian jade is easy to "sex" under the armpits, and it is easy to collapse when it is fine.
Transparency:
Hetian jade is a micro-transparent body that transmits light under normal light. The internal distribution of cloud-like texture resembles white clouds in the sky, with a fine floc distribution. The matte and fiber-interwoven structure with very fine graininess will have a soft reflection.
Russia’s transparency is mostly poor, and it is opaque – slightly transparent. The cloud-like texture inside the jade is agglomerate, which is more turbid, and part of the atheroma is its unique feature. The fiber interlaced development is incomplete, and the floc cotton inside is stiffer and the boundary is obvious. Its structure, "freezing point" is obvious, and relatively large, under the lamp can see the "crab claw pattern" in the jade.
Hardness comparison:
1. Qinghai jade: Mohs hardness is 5.5~6.0
2. Russian jade: Mohs hardness is 5.2~5.4
3. Hetian jade: Mohs hardness is 6.5~6.9
Acetate Viscose Fabric,Viscose Sand Wash,Viscose Twill Fabric,Viscose Single Jersey Fabric
Shaoxing Shangda Textile Co., Ltd , https://www.shangdatex.com