How many kinds of jade like black crows?
In recent years, there has been a kind of black jade on the market, which is confused with true and false. However, some people have studied the materials. Some people have suggested that only jadeite minerals can be called jadeite. In Zhao’s opinion, there are three kinds of black jade. Types of:
1. Hard jade jade (black chicken)
2. Greenstone Emerald (Ink)
3. Sodium chromite pyroxene jade (black dry green)
1, hard jade jade: black-bone chicken jade [black-bone chicken (Hong Kong), incense species (continental)]
The black-bone jadeite is mainly composed of single mineral jadeite, so it can be called hard jade rock. The mineral particles are short columnar and granular, and the rock is a crystal-like structure with a color similar to that of a black-skinned chicken. Due to the similarity with the black emerald, the black jade used in the market is confused with the black jade species for sale.
Black jade bracelet
Black jade
The black-breasted pheasant has obvious structure and is produced in Myanmar. It is mainly composed of jadeite minerals and the black part of the color forming mechanism is mainly caused by finely dispersed dark and opaque dust-like particulate matter and hull.
The blackness of black jade is related to the amount of pigment. The more dark and opaque substances, the deeper the blackness is. This kind of research has special scientific significance.
2, Mo Cui: black omphacite jade
Mo Cui is a kind of jade, "ink", as the name suggests, is black; "cui" refers to the green color of jade. The characteristic of the ink green is that the surface looks black, but in the transmitted light, it shows dark dark green or dark green. Ink is actually not black jade, but very dark green, or, in other words, the ink is due to the excessive concentration of green, which is black in appearance.
Black reflected under the reflected light, but the dark green texture is more delicate under the perspective light, the gloss is stronger after polishing, the main mineral is omphacite, only a small amount of jadeite, sodium chromite and a very small amount of black matter according to chemistry Ingredients, omphacite can be basically divided into three types: sodium-rich omphacite, calcium-rich omphacite and chrome omphacite. Both have common nymphite reflection infrared light and laser Raman spectroscopy characteristics. The omphacite is an intermediate member of the jadeite and diopside class.
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Mo Cui Emerald Stone
At a well-known auction in Hong Kong in 2002, a rare ink jewellery began at a high price of HK$1.3 million. From then on, Mo Cui became famous and provoked the high attention and collection desire of high-end jewellery collectors.
3, black dry green: sodium chrome pyroxene jade
When the thickness is large, it is black. When it is thin, it is bright green. The gloss of glass to semi-metal is lower than that of jadeite: generally 5-5.5 sodium chromite is a fine columnar aggregate, and its aggregate It is usually in the form of equiaxed grains, the main components are SiO2, Cr2O3 and NasO, and the sodium chromite is replaced by chromite.
Black dry green pendant
Black dry green wool
The above three kinds of black jade, they belong to the pyroxene type, the basic pyroxene containing sodium, and can form the same kind of similar image. Although there are different opinions in the workshop, the current situation in the existing market is called jade.
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