The difference between Hetian jade and Qinghai nephrite

The output of Qinghai nephrite is a major event in the jade market since the 1990s. Among them, Qinghai Baiyu has shaken the market of Hetian jade with its huge output and excellent texture. Qinghai nephrite and Hetian jade have the same texture that many friends can't tell.

Qinghai nephrite and Hetian jade are basically the same in material combination, occurrence and structural structure. It is only slightly different from Hetian-made nephrite in some aspects of output characteristics, structure and physical properties.

Qinghai nephrite has the distinguishing characteristics formed by the place of origin:

Better transparency; especially white jade, the transparency is significantly higher than the traditional Hetian jade, translucent, transparent and aura. In addition, due to the appearance of "waterline" and "water dew" patterns, local transparency is uneven.

Gray-white-yellow, yellow-gray white jade, characteristic jadeite jade and jadeite jade; Qinghai nephrite is slightly different from Hetian jade. Most white jade is gray-white, a small amount of yellow-gray, called "rice soup", with a feeling of grayness. Its sapphire gray-green tone "darkness" is not clear. In addition, emerald green, ash - smoke purple jade often symbiotic with white jade is also a typical color feature.

Texture: Soft jade jade requires fine and uniform, pure and without impurities, "fine light intrinsic, heavy and not moved". The structure of Qinghai nephrite is uniform but slightly thick, the texture is not delicate enough and is slightly tender, and the structure of "sugar crystal" and "ice crystal" is common. It has a waxy luster and lacks a moisturizing luster like "condensation". Therefore, although the output of white jade is large, there are few grades that reach the level of “Yellow White Jade”.

Jade: The texture of Qinghai nephrite is not pure, and there are often white "brain flower"-like stone flowers, flocculent cotton aphid. Translucent "waterline" "water dew", dark brown blemishes. "Stone", "Stone" and so on. The distribution of white clump-like "brain flower" and "floc-like cotton aphid" in the jade with better transparency is its common jade feature. In addition, the cat-eye flash belt formed by the tremolite mineral orientation and transparency is also a common feature.

Hardness: Qinghai nephrite, especially white jade, has a hardness of about 0.5 Mohs hardness. In practice, the smooth surface of Qinghai nephrite is scored by the break angle of the single-sided blade, and slight scratches are visible. Through experience accumulation, skilled appraisers and traders can quickly grasp this. In addition, since Qinghai nephrite is mostly a microscopic blade-like crystal structure, the crystal grain size is slightly thicker, and the mineral crystals are not tightly bound together, so the toughness of jade is also slightly lower.

Characteristics of raw materials: Qinghai soft jade raw material is mainly based on newly mined mountain materials, with large block size and uneven fracture but large surface. There are fewer phenomena in processing and physics. The raw materials are black leather (smoke green), white stone leather, white, transparent green, and no reddish brown sugar color. The main material is mountain material (pit material), and the mountain water is also angular, and there is no jade material. This is related to the weathering and mining of raw materials in the same place, without long-distance scouring, handling, rounding and abrasion of rivers.

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