How to identify sheep fat jade? How to identify mutton fat jade

Sheep fat jade can be identified according to its color. The real mutton fat jade is mutton fat white, white with oily luster, which can show a soft and slightly yellow luster under candlelight, while the pure white color of mutton fat jade is fake. In addition, natural lanolin jade is oily, and it will have a greasy feeling after rubbing.

After the water, the surface of the dry lanolin jade is fake. 1.Look at the identification method of this color, the sheep fat jade can be identified by color.

The color of mutton fat jade is mutton fat white, which will have an oily luster, white can be slightly yellow, and a soft yellowish halo can appear under candlelight. If the color is very pure white, it means that it is fake sheep fat jade. 2.

In addition, the identification method of oily mutton fat jade can also be identified by looking at its oiliness. The oiliness of the sheep fat jade is very important. After the palm of the hand is constantly rubbed, the surface of the jade will have a "greasy feeling", and the mutton fat jade cannot be wet.

If the surface of the jade is dry, it is likely to be a fake sheep fat jade. 3.Look at the identification method of mutton fat jade: Sheep fat jade can also be identified by looking at the structure.

When viewed under a microscope, real mutton fat jade can be seen to show tremolite crystals intertwined in a fibrous, felt-like, and fluffy structure, which is a unique structural feature of mutton fat jade, which other jade crystals do not have.

The identification methods of mutton fat jade are: fine structure, pure texture, good water head, strange luster, oily, white color, etc.

1. Thin structure.

Most of the components of mutton fat jade are tremolite, and jujube is essentially a silicate, which is fibrous or crystalline intertwined. Because its fibers are very fine, the texture of the sheep fat jade looks very uniform, the structure is fine, and there are no flaws visible to the naked eye.

2. Pure texture.

The texture of mutton fat jade is warm and moist, and the hand feel is not normal and delicate, and it is a high-grade white jade variety. Its main components are tremolite, epidote and actinolite, of which the tremolite content is as high as 99%, which is equivalent to no impurities.

Tremolite jade is also a kind of nephrite, but the tremolite content in the sheep fat jade is especially high, so the jade appears delicate and uniform outside the root, pure and flawless, and it is really worthy of being called white and flawless. The hardness of sheep fat jade is only second only to jadeite, between 6, with very high toughness, ordinary collision will not damage you, and it is also very suitable for carving.

3. The head is good.

When it comes to water heads, many people may not understand what it means, and in the jade industry, the transparency of jade is called water heads. The water head of mutton fat jade is good, which actually refers to the high transparency of mutton fat jade. Sheep fat jade is generally translucent, and the transparency of sheep fat white jade is very high in terms of the transparency of tremolite.

4. Luster.

Sheep fat jade is neither white nor pure white, nor is its luster pure white. You can see a faint yellow halo when you put the mutton fat jade against the candlelight, and a faint pink halo can be seen against the sun or white light, so some people call it "pink jade".

5. Oily.

The so-called "mutton fat" not only means that its color is like sheep fat, but its texture is also oily and smooth. The oiliness of mutton fat jade is very large, and it is often stroked with the right hand, as if a layer of oil has condensed on its surface, and the feel is quite delicate. The best proof of its oiliness is to use a thin wire to hang the mutton fat jade and throw it into the water, and then lift it to the point where it does not stick to the water.

6. The color is white.

The so-called mutton fat jade refers to white jade like sheep fat. Mutton fat white is different from white and pure white, it is a milky white, and the faint yellow color in the white is almost impossible to see under normal circumstances.

Key points for the identification of mutton fat white jade.

Five aspects must be met, namely, pure texture, fine structure, water head and feet, color mutton fat white, and oily heavy.

1. Pure texture - the tremolite mineral content in sheep fat jade reaches 99%.

Sheep fat jade is found in the most perfect area of alteration in the surrounding rock. When the granodiorite mass is in contact with the dolomite, a series of contact metamorphic rock series are generated, and the dolomite becomes dolomite marble, and the late magmatic hydrothermal fluid undergoes metasomatism along the dolomite marble tectonic fracture channel to form tremolite rock.

The alteration of the surrounding rock has formed three lithofacies of dolomite marble-tremolite dolomite marble-tremolite rock, and sheep fat jade is found in tremolite lithofacies.

2. Fine structure - tremolite in mutton fat jade is microfibrillary metacrystalline crystals and aggregates, tremolite crystal size can be determined under electron microscope and optical microscope, tremolite fibrous length (longitudinal), width (transverse) in mutton fat jade, these microfibrils, fluffy, felt tremolite crystals are intertwined with each other to form a fluffy structure, felt structure, and interwoven structure. [4]

Microfibril, fluffy, and felt tremolite crystal aggregates are characterized by no uniform extinction at the same angle under orthogonal polarization.

3. Water head and foot - water head and spiritual land are the names of jade transparency, and the thickness of 2mm is often used as the standard in tremolite jade, and white jade is translucent - opaque in this criterion, and the water head and foot of mutton fat jade are translucent.

4. The color is mutton fat white - mutton fat white is not pure white, but white with grease luster, some of which can reveal a slight yellow color in white, and those with poor texture can also reveal a slight light gray tone in white.

5. Oily and heavy - in the process of continuous touching in people's palms, mutton fat jade naturally produces a kind on the surface of jade"Oily"Sense, there is also this phenomenon in some Hetian fine white jade, when the mutton fat jade falls in the water, the jade body is lifted, and the water can be drip and not sticky, so the oily heavy mutton fat jade cotton is also very good, the so-called cotton, that is, toughness.

1. How to identify and identify the color of the mutton fat jade, the mutton fat white presented by the mutton fat jade is not pure white, but white with grease luster, and the white can reveal a slight yellow, and the mutton fat jade with poor texture can also reveal a slight light gray tone in the white. 2. Look at how to identify the feel of the mutton fat jadeIn addition, the mutton fat jade can also be identified by looking at the feel, and the surface of the mutton fat jade will produce an oil ** after the palm is constantly touched. And when the mutton fat jade is taken out of the water, the mutton fat jade will not drip water.

3. Look at the structure of mutton fat jade, how to identify mutton fat jade, you can also identify it by looking at the structure, when observing mutton fat jade with a high-powered magnifying glass, you can find that the structure of mutton fat jade is very fine, and its crystals will be fibril, fluffy, and felt-like tremolite crystals will be intertwined with each other.