The so-called "green" in ancient China refers to black, so the varieties of Hetian jade have black blue, blue and white, ink blue and white, black and blue (jasper bottom jade). It is said that the top Moyu players have to mention Taqing (Tashkurgan Heiqing). Why is the top Taqing always being the most popular and even hard to find?
Hetian jade top tower blue
1. Blackness: The blackness is the highest, and there are many blacks in the ink.
2, the specific gravity: 3.0-3.2, the material is the highest density material in Hetian jade,
3, fineness: the top material basically can not see the material structure,
4, hardness: 6.5 or more, the hardest can reach 7.5 degrees,
5, toughness: the top material is generally steel sheet material, the so-called steel sheet material is a whole piece of rough stone or cut into pieces or bracelets, tapping has a very crisp metal sound, carving does not collapse, can do 1mm thin tires. It can be seen that its toughness is good.
6. Transmittance: The light transmission is positive green, 1-3mm is the best, the transparency is no more than 5mm, the material above 5mm is definitely not black enough, and the black is definitely not enough. (The white-colored ink jade is white in light, and the black-green light also has yellow-green, sugar-yellow or blueish color. The color of the material is related to the mineral content contained)
7. Uniformity: Black is just an indicator, enough black enough to be even enough.
8, purity: no string of impurities, pyrite, etc.
9. Oily: Why is oily last? Because the top ink jade players know: the darker the Hetian Moyu, the higher the graphite content, the higher the graphite content, and the lack of certain oil. Satisfying the first 8 points is already considered a top-grade goods. Satisfying the above 9 points is a rare high-priced ink blue (bi) jade.
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