1, identify jadeite A goods B goods C goods You can identify the quality grade of jadeite by measuring the density of jadeite. Generally speaking, the density of jadeite is in the range of [25-43]. The jadeite density of A jadeite is low. Emerald with a density higher than 33 belongs to B-goods jadeite, while that of C-goods jadeite is higher than 43, so it can be said that it is not jadeite.
2. In addition, the luster of B jadeite is different from that of A jadeite. Jadeite has a compact structure and a glassy appearance. Due to the glue injection, the appearance of B jadeite is waxy luster.
3,-is to add artificial color jade; Usually it is soaked in strong acid to improve its transparency, and then colored, that is, BC goods.
4. How to identify A, B and C jadeite? Oblique lighting method with 40 times magnifying glass, side light observation. A cargo jade has a smooth surface like a mirror and a strong glass luster; B sand holes and pits in jadeite are mostly dissolved holes, which are characterized by round, deep, black and blunt edges.
How to tell whether jadeite is A or B? How to see whether jadeite is a or b
Naturally. A piece of jade has no other physical and chemical treatment, its color and structure are natural, and there is no jade with foreign substances added. B-grade jadeite is a kind of jadeite that has been deeply white and filled, not natural. Details. A piece of jadeite sometimes appears orange peel-like sesame spots under a magnifying glass, which is called orange peel effect.
The difference of color A The jadeite is uniform in color, consistent in tone and bright in color, and does not mix with other variegated colors. Grade B jadeite is hollow in color, dull in color and has certain impurity color. The difference between A goods and B goods and the bottom A goods should be transparent, free from impurities and black spots.
Look at the fluorescence: Jade B has even to moderate yellow-green and blue-green fluorescence. Look at the thermal reaction: jade A does not melt below 800℃, and rubber-filled jade B carbonizes after heating at 200℃~300℃.
First, observe the color of jadeite. If the color looks unnatural and yellow, it means that it is bleached jade, that is, jade B. On the contrary, the color of jade A looks much more natural.
Teach everyone a trick to look at a goods and b goods. It is enough with the naked eye. Under natural light or fluorescent lamp, see if there is a brown, yellow or red background color of jade. The jadeite of A goods basically has these colors, which are caused by iron and magnesium oxides filled in the later period.
How to distinguish jadeite A goods from jadeite B goods?
1, the difference between the colors of jadeite A and B. Jade A has uniform color, consistent tone and bright color, and does not mix with other variegated colors. Grade B jadeite is hollow in color, dull in color and has certain impurity color. The difference between A goods and B goods and the bottom A goods should be transparent, free from impurities and black spots.
2, look at the luster: A goods have a strong glass luster. When identifying jadeite A and B goods with naked eyes, first look at the luster of natural light. Generally, the luster of A goods is strong glass luster, while the light of B goods is mostly waxy, with poor luminosity and smoothness.
3. Jadeite A is a natural jadeite without chemical or physical treatment, and Jadeite B is a jadeite soaked in strong acid and artificially treated later.
4. Distinguishing A-goods and B-goods jadeite can be seen by texture. A jade is very pure in texture, with few internal defects, and looks crystal clear as a whole. B Although the texture of jadeite looks transparent, its hardness is low and it is easy to be damaged.
5, look at the fluorescence: Jade B goods have an average to medium yellow-green and blue-green fluorescence. Look at the thermal reaction: jade A does not melt below 800℃, and rubber-filled jade B carbonizes after heating at 200℃~300℃.
6. The category of B goods is: mainly after pickling, and then injecting a lot of glue or wax, the internal structure has changed. The jadeite of B goods has rubber luster, dull knocking sound and relatively low price.