1, sheep fat white jade, also known as "white jade", "sheep fat jade", is the top of nephrite, extremely precious.
Sheep fat white jade is a kind of horny jade, white jade is good. As the name implies, the white fat of sheep fat should be white first. It is like white sheep fat (commonly known as sheep oil). If it is colored, it is not sheep fat white jade. The white is slightly pink, and some people call it "goat jade" and have not obtained the consensus of jade experts and scholars. Some are called "powder jade". The tallow white jade mainly contains tremolite (95%), actinolite and epidote. Very white, fine texture, lustrous and moisturizing, like gelatin. The ancient biography "white ç’§ innocent" refers to white jade.
2, Yangzhibaiyu is a gem-grade material in Hetian jade, which is the best of white jade in pure white color, with good luster and texture.
The performance is: warm and compact, pure and pure, white and flawless, like gelatin, hence the name. The simplest way to distinguish this jade from ordinary white jade is to watch it under a white fluorescent light. The white fat white jade is facing the fluorescent lamp, showing a pure white translucent shape with a powdery mist. The general white jade is translucent to the fluorescent lamp, but it has no powdery sensation.
3, the biggest difference between the two is that regardless of the grade level of white jade, it is very white to the naked eye, but under the white fluorescent lamp must have a slight yellowish shade.
Therefore, if there is a slight yellow color under the fluorescent lamp, it cannot be called sheep fat white jade. The rare and precious sheep fat jade that meets the stringent standards is absolutely inconspicuous.
4. [History] According to the materials discovered by archaeological finds. As early as 3,500 years ago in the Yin Shang period, the jade produced in Kunlun Mountain has been introduced to the Central Plains.
After the Spring and Autumn Period and the Warring States Period, Hetian jade gradually became the main jade used by the emperors and nobles of the past, most of which were collected materials. By the end of the Yuan Dynasty, the mountain material was used. After the Qing Dynasty, the output of the mountain material had greatly exceeded the material. Sheep fat white jade has been highly valued since ancient times and is the best in jade. It is very precious. It not only symbolizes the gentleman's character of "benevolence, righteousness, wisdom, courage, and cleanness", but also symbolizes the secular feelings of "beautiful, noble, auspicious, gentle, and comfortable."
5, in ancient times, the emperor will be eligible to wear white jade.
Archaeological facts have confirmed that the jade used by many ancient emperors is a special white jade. Among the treasures of museums in many localities, the historical relics carved from white jade and jade are not regarded as "national treasures". For example, the Western Han Dynasty "Queen of the Queen" unearthed is made of crystal clear and pure white sheep.
The late famous archaeologist of the country, Mr. Xia Wei, once said in the article: "The Han Dynasty jade materials... the milky white sheep fat jade has increased greatly." The physical proof refers to the Han Dynasty aquatic sheep fat white jade. This fully proves that the sheep fat white jade from the theory to the practice is crystal clear and innocent. Its characteristics are: especially white, bright, warm, fine, grease and so on. The best white jade is innocent, the best "white as fat", that is like fat fat just cut. Its hardness is 6 to 6.5, second only to jade.
6, due to high hardness, landed for more than 2,000 years, not all, but not unscrupulous.
The soft ones are chicken bone white, the hard parts are porcelain white, and the parts are exposed to the aging phenomenon. It is not as white as it used to be. This is not a problem, but the characteristics of the ancient jade. The sheep fat white jade has been soaked in water and soil for more than 2,000 years. Its texture is hard and dense, and it is as warm as ever. This is its valuable place, and it is also its valuable value. This white fat jade, the white jade of the Han Dynasty aquatic products, has "rice infiltration" in the muscles, and the offspring are difficult to imitate, only natural. In the Ming and Qing Dynasties, there was no "rice infiltration" in the white and white jade.
7, [classification] sheep fat white jade is divided into "child jade" and "mountain material." The so-called "Ziyu" was taken from the Yuhe River in the Kunlun Mountains.
This "jaw jade" is fine, moist and shiny like fat. Some "Zhayu" muscles contain "rice infiltration", which is a white rice-like shape that is undiluted. This is one of the texture characteristics of aquatic white jade; and some have long-term immersion in water and sand with various colors of leather. This kind of "child jade" is superior to mountain materials and is extremely rare. Mountain material, pure white as fat. According to the introduction of relevant materials, after the Spring and Autumn Period and the Warring States, Hetian jade gradually became the main jade material, all collecting materials. Take the mountain material from the beginning of the Qing Dynasty.
8. Yangzhibaiyu has been highly valued since ancient times, but it is rare in the world. It is the best in jade and the price is very precious.
White jade not only symbolizes purity, nobleness, and warmness, but also symbolizes auspiciousness and peace. The ancients said: "Warm, benevolence!" In ancient times, the emperor was qualified to wear white jade. The facts have confirmed that the jade of the Western Han Emperor is a special Han Dynasty aquatic sheep fat white jade. For example, the Western Han Dynasty "Queen of the Queen", which has been designated as the "National Treasure" by the state, is made of crystal clear and pure white fat jade.
9. The sheep fat white jade has been highly valued since ancient times. It is the best in jade and very precious. It not only symbolizes the gentleman's character of "benevolence, righteousness, wisdom, courage, and cleanness", but also symbolizes the secular feelings of "beautiful, noble, auspicious, gentle, and comfortable."
In ancient times, the emperor was qualified to wear white jade. Archaeological facts have confirmed that the jade used by many ancient emperors is a special white jade. Among the treasures of museums in many localities, the historical relics carved from white jade and jade are not regarded as "national treasures". For example, the Western Han Dynasty "Queen of the Queen" unearthed is made of crystal clear and pure white sheep.
10, [identification] The identification of sheep fat jade must meet five aspects, namely, pure texture, fine structure, water head, color sheep white, oily weight.
Pure texture - the content of tremolite minerals in sheep fat jade reaches 99%.
The sheep fat jade exists in the perfect area of ​​the surrounding rock alteration. When the granodiorite is in contact with dolomite, a series of contact metamorphic rocks are formed, and the dolomite becomes dolomite marble. The late magmatic hydrothermal fluid along the dolomite marble tectonic fissure channel is metamorphic to form tremolite. The surrounding rock erosion is transformed into three kinds of lithofacies of dolomite marble-tunnelized petrochemical dolomite marble-metamorphic rock, and the sheep fat jade is found in the tremolite rock facies. The hardness of sheep fat white jade is 6～6.5, second only to jadeite. The toughness and wear resistance are strong in jade, the texture is dense, and the chemical properties are extremely stable.
Fine structure ——The tremolite in the sheep fat jade is microscopically crystallized and aggregated. The crystallite size of the tremolite can be determined under electron microscope and optical microscope. The length of the tremolite fiber in the sheep fat jade ( The longitudinal direction is 0.033-0.01 mm, and the width (transverse direction) is 0.0006-0.001 mm. These microscopic, fluffy, felt-like tremolite crystals are intertwined to form a pile-like structure, a felt-like structure, and an interwoven structure. Microscopic, fluffy, felt-like tremolite crystal aggregates, characterized by orthogonal polarized light, do not exhibit uniform extinction at the same angle.
Water head foot - water head, spirit land is the name of jade transparency, in the tremolite jade often from the thickness of 2mm as the standard, white jade in this standard is translucent - opaque, the head of the sheep fat jade shows a translucent shape.
The color is sheep fat white - sheep fat white is not pure white, but white with grease luster, some in white can reveal a slight yellow, poor texture can also reveal a slight light gray tone in white .
Oily weight - the fat touch of the sheep fat jade in the palm of the hand, it is self-contained, creating an "oily" feeling on the surface of the jade, also in some Hetian fine white jade, when the sheep fat jade falls in the water , mentioning the jade body, can be dripping water is not sticky, so the oily heavy sheep fat jade is also very good, the so-called cotton, that is, toughness.
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