A good opal stone produces a flame-like appearance. This appearance has only been found in very few substances, but it has not been found in other gemstones, and it has attracted people's interest and intoxication in ancient times. This phenomenon of flame-like appearance caused by diffraction of light is called color change. This is the identification feature of opal stone and its main attraction as a gemstone. The following China Jewelry Merchants Network Xiaobian will introduce the maintenance and identification methods of opal stone.
Maintenance method of opal gemstone
1. The main component of Opal is SiO2, but it contains H2O, and it is amorphous. Its hardness is much lower than that of crystalline crystal. It is easy to be abraded and loses its surface gloss. Therefore, it should be avoided when wearing. Rub the harder things and keep them from being mixed with other jewels.
2. Since the water in the opal belongs to the adsorbed water, its escape temperature is only 100 °C-110 °C. Although the water in the opal does not escape during the daily wearing process, the water in the long-term high temperature or low humidity environment is easily lost, resulting in loss of color, dullness and even bursting. Therefore, it is not suitable to be exposed to fire or high temperature during processing or wearing. It should not be exposed to sunlight. Try to wear as little as possible in areas that are too dry. For the original stone, it should be stored in water. If the jewellery counter is equipped with spotlights, etc., it should be placed. Water cup to keep the humidity.
How to identify opal gemstones
Opal can be divided into black opal, white opal, yellow opal, etc. according to its color, among which black opal has the highest price. In order to improve the price of white or yellow opal at a lower price, some people use artificial methods to make them discolored and become "black opal" to gain high profits.
The main method is to boil or inject plastic to make the white opal black. The method of identification is that the opal weight of the sugar-smelting or injection molding is significantly different, and the specific gravity value is lighter when tested in water. The heated opal can also be used to test the injection opal. The natural opal hot needle can not be inserted, the injection opal can be plunged, and the plastic scent can be produced.
Organic Acid,Acetic Acid,Organic acid formula
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