the cuff links is only second to the diamond in the table of hardness

Poly black refers to jade or white jade ink than the aggregation, can be used as a pretty color. Blot are scattered into affect. Moyu are small pieces of black because containing more subtle due to graphite flake.
Classification and the skin color of nephrite: diamonds in the rough skin, according to their composition and the occurrence and other features can be divided into color leather, sugar, leather, leather three types of stone. Skin color: a variety of colors and fill up the sub-jade appearance distribution layer of jade leather. Jade cufflinks community to a variety of colors, names, such as the black child, deerskin child. Skin color can be seen that the Ember quality, such as the black child, deerskin child, mostly fine white jade good material. But this also needs to have cufflinks of similar hardness. With the quality of Ember, such as with Qiu and skin color, the higher value. The jade thickness of the skin is thin, generally less than 1 mm. The form of a variety of skin color, and some into the clouds like vein, some into scattered punctate.
 The formation of skin color is due to the three iron oxide and ferrous oxide in Hetian change in the oxidation conditions, so it is secondary. Experience of the pick up jade, to the middle and lower reaches of Ember go to colored skin; upstream, find the opportunity to color leather jade rarely. In addition, in the cracks of the primary jade ore body near tender can be occasionally found in the skin of the mountain material, which is formed due to secondary oxidation. Sugar Paper: refers to a layer of yellowish brown and dark reddish brown jade leather Wada the Yushan expected appearance of the distribution, because of the color like brown sugar color, so called sugar with sugar skin jade cufflinks jade. The synthetic sapphire cufflinks is the best.
Sugar of sugar jade leather thickness from a few centimeters to 20 - 30 cm, often white jade or sapphire surrounded, was a transitional relationship, sugar jade produced in the vicinity of the ore body cracks. Sugar jade is the oxidation product of the environment, after the formation of the Department and nephrite, by the penetration of water along the Hetian jade ore body cracks of the residual magma, and ferrous oxide into ferric oxide results, sugar, leather is dyed iron oxide. Stone Paper: refers to the surrounding rock surrounded by Wada the Yushan material appearance. The surrounding rock is a tremolite of the Baiyun marble rock, with the re-mining of jade mined together, attached to the surface of the jade, this stone package jade stone and jade clear boundaries, can be separated. It is inexpensive, and hardness of the cuff links is only second to the diamond in the table of hardness.
When the long-term erosion by water or glaciers and handling, stone and jade separation. Surrounding rock another is a tremolite rock. Account of the coarse crystalline tremolite such as nephrite formation process is not thorough account of the surface of the jade, often accompanied by coarse-grained tremolite, this leather stone and jade boundaries of the transition. Called the yin and yang, face, and nightside refers to jade appearance of this stone. Generally, the normal imitations can not leave a trace on the sapphire but only the genuine mens cufflinks can. Yufu Workshop suggest that the purchase and Tian Baiyu roughly to judge from the following perspectives: the first concept check the whiteness level is enough, enough to look Yuye Run degree, that jade is delicate the waterline proportion, accounting for only one or two , no problem, Yu spent a proportion of the impurities were many, Yumian whether the cracks, I like to look at the end of skin color jade skin color is gorgeous, Qiu leather, Red leather, deerskin, sprinkle gold skin. Jade pale blue to deep blue, the color of many types of different shades of color, cyan, dark blue, green as young, gray blue, dark gray green, emerald green and so on. And nephrite jade the most succulent and delicate jade value of the past two years continue to climb. Moyu light black ink to the ink for cloudy banded. The diamond cufflinks is the hardest material in the nature. There are dark clouds films, short ink light, gold mink to be the beauty to be. In the entire compound, the ink of different degree of strength of deep light distribution uneven, more common in the transition and jade, white jade. Generally the whole ink, poly ink blot.