As a sister of the world-famous lapis lazuli, it is Afghan jade. As an ancient jade species, it has flourished in the world for thousands of years, and the reason why it has been passed down for a long time is also related to its culture, health and health values. Below we summarize some of the characteristics of Afghan jade. Ayu is an ancient jade species, the finest Afghan jade texture is delicate, oily and similar in color to the top Wada jade, but the value is different. Ayu has low hardness, no Hetian jade, and the hardness of jade is high. There are many counterfeit products of Ayu, of which Han white jade and Dali rock are the main counterfeits. True ayu is a type of jade from the Alps.
Before 2005, most of the ayu was produced in Afghanistan and Turkey, but due to the war, most of the jade mines in Afghanistan have been stopped. After 2005, most of the ayu on the market was produced in Turkey and Iran. The main component of Afghan jade is carbonate jade, but not all carbonate jade is Afghan jade. Among them, Han white jade and Dali rock, although they also contain carbonate jade, but have an essential difference from Ayu. Ayu has a slightly lower hardness and is rich in mineral elements inside, which has the effect of health care and health. Ayu is produced in the mountains of Eurasia, where the jade is naturally exposed outside the mountain, exposed to the sun for hundreds of millions of years, but without losing its moisture and luster, but the color is like gelatin, grease luster, essence, thick and warm. After a long period of geological changes, The Afghan white jade has been transferred from the top of the mountain to the bottom of the river, and they lie quietly at the bottom of the precious water source, experiencing tens of millions of years of moisture, becoming more and more crystalline, more and more dense, achieving its unique quality.
In recent years, Afghanistan's original scarce water resources have gradually shrunk, folklore believes that jade mines absorb a lot of water, scientists can not explain the water absorption of Afghan white jade, the physical structure of white jade is thick and meticulous, but also contains water, and it is not easy to evaporate, very magical. As early as the flourishing period of civilization in the Two Rivers Valley, the princes and nobles of various countries used Afghan white jade to relieve heat, health care, and health maintenance. Ayu is a metamorphic rock, scientific name calcite jade, also known as carbonate jade. It is formed by carbonate rocks undergoing regional metamorphism or contact metamorphism. It is mainly composed of calcite and dolomite, and also contains wollastonite, talc, tremolite, diopside, plagiolite, quartz, magnesite and so on. It has a granular metamorphic structure, a blocky (sometimes banded) structure. The Mohs hardness is between 4.0-5.0, and the specific gravity is between 2.7g/cm³-2.9g/cm³. Because the Afghan white jade is very delicate and uniform, glossy and oily, the naked eye can not see the jade flower, often used to impersonate the fine white jade or mutton fat jade, the method of identification is very simple, the hardness of Afghan jade is low, and secondly, the price of Hetian jade, especially to achieve the whiteness of the oil in Afghanistan, is not acceptable to ordinary people. Moreover, such a pure mutton fat grade and Tian Yu are even more rare treasures, I am afraid that there are at most one or two pieces in the whole country. In addition to the difference in price and hardness, there is also a difference in the permeability and color between Hetian jade and Afghanistan, the relative permeability of Hetian jade is poor, the internal particles are more delicate, and the permeability of ayu is relatively good, because there is no speculation, and the price is extremely low.
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