2. Avoid dust as much as possible. If there is dust in daily jade articles, clean them with a soft brush; If dirt or oil stains are attached to the jade surface, it should be scrubbed with mild soapy water first, and then rinsed with clear water. Do not use chemical degreasing agent solution.
3. Put away the pendant when not in use. It is best to put it in a jewelry bag or jewelry box to avoid scratching or damage. If it is high-grade jade jewelry, don't put it on the counter to avoid dust and dirt, which will affect the brightness.
4. Try to avoid contact with perfume, chemical liquid, soap and human sweat. As we all know, sweat contains salt, volatile fatty acids and urea. If jadeite comes into contact with too much sweat and is not wiped clean immediately after wearing, it will be eroded, destroy the outer layer and affect the original brightness. In particular, "glass species" of jadeite and suet white jade, avoid sweat and grease. Many people think that the more jadeite touches the human body, the better it will be moistened with sweat. In fact, this is a big misunderstanding.
Jade is different from ancient jade. Ancient jade needs the help of the process of birth and human body temperature. The jade in the "glass ground" itself is crystal clear, so there is no need to use any method and there is no way to make it more transparent. If you sweat too much, sheep fat white jade will easily turn pale yellow and no longer be as pure white as fat.
5. Avoid long-term direct sunlight. Jade should avoid exposure to the sun, because when jade encounters thermal expansion, its molecular volume increases, which will affect its quality. Especially hibiscus jade, crystal, agate and so on. It will burst when it encounters high heat, so it is even more taboo to be close to the heat source.
6. Pendants should be wiped with a clean, soft white cloth, not dyed cloth or fibrous hard cloth. Jade jewelry inlaid with diamonds, rubies and emeralds. Only clean white cloth can be used to wipe off oil, dust, impurities, moisture or sweat, which will help to maintain and maintain the original quality.
7. Jade articles should keep proper humidity. Emerald depends on certain humidity to keep it, especially water bile agate and crystal jadeite. During the formation of water bile agate, there was natural water in it. If the surrounding environment does not maintain a certain humidity and dryness, the natural moisture in it will easily evaporate, thus losing its artistic and economic value.
From the perspective of western gem culture, jade is soft and hard, and jade usually refers to nephrite. It belongs to one of the most common jewels.
According to "Tengyue Local Records" written by Qing Jinshi Cun Kaitai, "Tengyue is a collection of jade articles, made into utensils and sold to various provinces in Yunnan. Top grade jadeite is mostly sent to eastern Guangdong, Shanghai, Fujian, Zhejiang and Kyoto.
In western gemology, the English name of jade comes from Spanish invaders, who named the jade plundered by Pieda in Mexico as ijead, and ijead is the last word.
China is the earliest and most extensive country in the world to exploit and utilize jade. There are many records in ancient books, and the names are also very miscellaneous, such as Shuiyu, Heritage Jade, Peiyu, Xiangyu, Nephrite and so on. Tremolite nephrite unearthed from Chahai site in Fuxin city, Liaoning province is about 8000 years ago (early Neolithic age), which is the earliest known real jade in the world.
The most famous jade in China is Hetian jade in Xinjiang, which, together with dushan jade in Henan, xiuyan jade in Liaoning and lantian jade in Shaanxi, is called the four famous jade in China.
Jade is a relatively valuable mineral. Jade is rich in trace elements such as zinc, iron, copper, manganese, magnesium, cobalt, selenium, chromium, titanium, lithium, calcium, potassium and sodium. The embellishment of jade can eliminate impetuous heart, the color of jade can delight bored heart, and the purity of jade can purify dirty heart. Therefore, a gentleman loves jade and hopes to find natural aura in the jade body.
Jade is the beauty of stone, with positive, moist and pure color. The same is true of precious stones. Its value does not depend entirely on the composition, and most jadeites are worthless. Like people, every nation produces heroes.
definition
Nephrite refers to Hetian jade in a narrow sense, and broadly includes more than ten kinds of nephrite such as xiuyan jade, Nanyang jade and Jiuquan jade. Many nephrite have the same long history, such as xiuyan jade. Jade only refers to jade.
Jade is a special mineral with sociality and treasure, which was screened and confirmed by the ancients in the process of making tools with selected stones for tens of thousands of years. Shuo Wen Jie Zi interprets jade as "the beauty of stone is jade". In Ci Hai, jade is simply defined as "a beautiful stone with moist luster".
These statements are what we call jade in a broad sense today, including not only Hetian jade and jadeite, but also traditional jade such as chalcedony, xiuyan jade, Nanyang jade, crystal, agate, amber, coral, turquoise, lapis lazuli and Huanglong jade. Modern mineralogy divides jade into jadeite and nephrite. Jade is jadeite, while nephrite mainly refers to Hetian jade in Xinjiang, which is a narrow definition of "jade".
Judging from the history of jade used in China, Hetian jade in Xinjiang was used on a large scale only after Shang Dynasty, and before that, jade materials used in various places were basically all kinds of beautiful stones made from local materials. Therefore, the definition of Chinese jade can not rely solely on the standards of modern mineralogy, but should proceed from a historical perspective, respect traditional habits, and take jade in a broad sense as the object of study of jade and jade culture.
Regarding the concept of jade, jade in a broad sense should have three characteristics:
First, the material meets the requirements of "beautiful stone";
Second, it has the basic style of typical jade in modeling;
Third, jade articles must be made by special jade-making methods, such as grinding and drilling, rather than ordinary stone-making techniques. Furthermore, the jade articles studied should have a certain historical age, and their historical and cultural values must be emphasized.
colour
Nephrite mainly includes white jade, sapphire, topaz, purple jade, jet, jasper, sapphire and ruby. Among them, topaz such as engine oil is top grade, purple jade is usually light pink, jet jade is jade with many black spots on jasper, and sapphire is dull blue and white jade. Usually white jade is the best.
Emerald is jade, and its colors are white, purple and green. It can be called ice land (white) or green land (green). Green is the best. Tri-colored jadeite is also called "Taoyuan Jieyi" or "Fu Lushou".
References:
Jade (mineral aggregate)-Baidu Encyclopedia