Afghanistan jade is also called carbonate jade, whose main component is calcite, so it is also called calcite jade. A small part contains tremolite, which has a high hardness. Hetian jade is mainly composed of tremolite, so people often use Afghanistan as Hetian jade to seek ill-gotten gains. Many unscrupulous businessmen sell white marble and marble as low-grade afghanistan jade and pretend to be afghanistan jade! Although both of them are mainly carbonate jade in identification, they are completely different in quality and value. The most obvious difference between them lies in the wettability and permeability of oil. No matter how similar the composition is, the color of marble can never compare with that of afghanistan jade. Just like diamonds and graphite, the main component is carbon, but their properties and values are quite different.
What kinds of jade are there in Afghanistan? The real afghanistan jade is a kind of jade produced in the Alps. Before 2005, Afghan jadeite was mostly produced in Afghanistan and Turkey. Later, due to the war, most jade mines in Afghanistan were closed. After 2005, most Afghan jadeites on the market were produced in Turkey and Iran. Afghanistan jade is mainly composed of carbonate jade, but not all carbonate jade is afghanistan jade. Among them, white marble and marble also contain carbonate jade, but they are essentially different from afghanistan jade. Afghanistan jade has a slightly lower hardness and is rich in mineral elements, which has the effect of health care.
Afghanistan jade is produced in the mountains of Eurasia. The jade here is naturally exposed outside the mountains. Under the exposure of hundreds of millions of years of scorching sun, it does not lose its moisture and luster, but its color is like coagulate fat, oily luster, bare and internal, heavy and moist; As early as the prosperous period of civilization in the two river basins, princes and nobles all over the world used afghanistan white jade to cool off the heat, maintain health and preserve health.
Quote GIG local jade research report: afghanistan jade is a metamorphic rock with scientific name calcite jade, also known as carbonate jade. It is formed by regional metamorphism or contact metamorphism of carbonate rocks. It is mainly composed of calcite and dolomite, and also contains silica fume, talc, tremolite, diopside, plagioclase, timely and periclase. It has granular metamorphic structure and block (sometimes strip) structure. Mohs hardness is between 4.0 and 5.0, and specific gravity is between 2.7g/cm3 and 2.9g/cm3.
How many colors do Afghan hounds have? Afghan hounds come in several colors. Afghan hounds used to be outstanding shepherds and hounds in countries with ancient origins. They have a keen sense of smell and excellent eyesight, so they have repeatedly made meritorious deeds in hunting. Because of its luxurious appearance and excellent companion dog, it is widely loved by Europeans and Americans. Afghan hounds may appear in a variety of color combinations, all of which can surprise people. However, relatively rare color combinations are slightly more expensive because they cater to the market, aesthetics or rarity. Of course, owning every Afghan hound with different colors will give people a noble temperament, noble, aloof and cold. They all have long and thick hair, which flutters gently under the breeze and makes them look more beautiful and moving. The coat colors of Afghan hounds are mainly black, red, black, golden retriever, milky white (golden), white, variegated, blue and domino. The Afghan hound's body, waist, ribs and legs are covered with thick, silky hair, which is delicate and supple. Moreover, its hair is bright, and the hair on its head is fashionable, silky and looks very long. When it runs, its hair flutters gently, giving people an elegant feeling. Strictly speaking, there are not too many requirements and restrictions on the color of Afghan hound hair, so multiple colors are allowed. Of course, ordinary colors or combination colors will be better and give people a more noble temperament.
How many colors do Afghan hounds have? Which color is popular? Afghan hounds can give people a noble temperament, noble, lonely and cold. They all have long and thick hair, which flutters gently under the breeze and makes them look more beautiful and moving. The coat colors of Afghan hounds are mainly black, red, black, golden retriever, milky white (golden), white, variegated, blue and domino.
Which is better, afghanistan jade or xiuyan jade, needs to be explained first. As far as the single piece is concerned, this question cannot be answered, even if it is a single variety, there is no unified answer.
Every kind of jade has its own fine products, and there are also worthless low-end products.
On the whole, Xiuyu is slightly better than afghanistan jade.
The wholesale price of ordinary bracelets in Xiuyu is tens of yuan, slightly better than 40; Afghan jadeite does not surpass that of 40 yuan.
Xiuyu's ornaments are more exquisite, and the medium-sized products are at the price of small four; The ornaments of Afghan jadeite are more than several hundred yuan in the middle.
The river ink jade in xiuyan jade is relatively good, with thousands of varieties, which are rare in afghanistan jade.
Roughly so, I hope to have some reference for you.
Good luck!
What color is Afuyuan, the characteristic of afghanistan jade? Afghanistan jade is very white, with high luster, and it is hard in dry state. Compared with the two, of course, the collection of Kunlun jade is better, Kunlun jade is closer to Hetian jade, and its luster is insufficient.
Which color is better in afghanistan jade? The higher the whiteness, the better.
But if yellow is natural, beautiful or beautiful, that's good.
In fact, afghanistan jade, as a low-end jade product, has little price difference.
It depends on your preference.
Where does Shanghai have a factory that makes Afghan jade gifts? There is a manufacturer of jade gifts at No.789 Tianshan Road, Shanghai. Ask yourself. I think it's called Shanghai Jin Woo.
Afghanistan jade's original stone price per ton is called afghanistan jade, which means fine marble, good building materials and wall decoration materials, and some people pretend to be Hetian jade with things.
The price should be lower than11000 of hetian jade.
-:(Taobao's JD.COM Treasure Zhai.
Fluorite has several common colors: green, blue, brown, yellow, pink, purple, colorless and so on.
Fluorite (fluorite)
Mineral (rock) name: fluorite
Material properties:
Chemical composition: CaF2
Crystal structure: the unit cell is face-centered cubic structure, and each unit cell contains 4 calcium ions and 8 fluorine ions.
Crystallization state: crystal system: equiaxed crystal system
Crystal habit: usually cubic, octahedral, rhombic dodecahedron, polygonal, or strip-shaped dense block aggregate.
Common colors: green, blue, brown, yellow, pink, purple and colorless.
Gloss: glass luster to sub-glass luster.
Cleavage: Four groups of perfect cleavage.
Mohs hardness: 4.
Density: 3. 18 (+0.07, -0. 18) g/cm3.
Optical properties: isotropic body.
Polychromaticity: None.
Refractive index: 1.434 (0.00 1).
Birefringence: None.
Ultraviolet fluorescence: it varies with different varieties, and generally has strong fluorescence and can emit phosphorescence.
Absorption spectrum: featureless, with large variation, and generally strong absorption.
Magnification inspection: banded, two-phase or three-phase inclusions show that cleavage is triangular.
Special optical effect: color change effect.
Optimization processing:
Heat treatment: Black and dark blue are often heat-treated into blue, which is relatively stable. Avoid heating to above 300℃ and it is not easy to detect.
Filling treatment: filling surface cracks with plastic or resin to ensure that they do not crack during processing.
Irradiation treatment: colorless fluorite is irradiated into purple, but it quickly fades and is unstable after exposure to light.
Fluorite, also known as fluorite, is a natural fossil. Compared with optical glass, fluorite has the advantages of low refractive index and low dispersion, but it can't be used in practical application because of its difficulty and economic factors. The so-called optical glass used in optics takes silicon dioxide as the main raw material, adding new additives such as barium oxide or lanthanum, dissolving in a melting furnace at a high temperature higher than 1300 degrees, and then solidifying from liquid to solid through extremely slow cooling.
Ancient Indians found that there were many cobras on a small hill. They always wandered around a big stone. A natural phenomenon aroused people's interest in exploring mysteries.
It turns out that whenever night falls, the big stones here will glow slightly blue, many phototropic insects will fly over the bright stones one after another, and frogs will jump out to compete for food.
Insects and cobras hiding not far away have also come to hunt frogs. Therefore, people call this kind of stone "snake eye stone". Later, I learned that snake eye stone is fluorite.
The composition of fluorite is calcium fluoride, also known as fluorite, gangue and fluorite. Because it contains various rare elements, it is often purplish red, green and light blue. Colorless and transparent fluorite is rare and precious.
The crystal form is cubic, octahedral or rhombic dodecahedron. If fluorite is placed under ultraviolet fluorescent lamp, it will emit beautiful fluorescence.
The application of fluorite and its processed products has involved more than 30 industrial sectors. Adding fluorite in steelmaking can improve the fluidity of molten steel and remove harmful impurities such as sulfur and phosphorus.
Half of the world's fluorite production is used to produce hydrofluoric acid, and then cryolite is developed for aluminum smelting industry. The refrigerant (freon) in the refrigerator should be fluorite; 1986,
China's first generation of artificial blood also needs fluorite. In recent years, scientists are developing fluoride glass, which may be made into a new type of optical fiber communication material, which can be spread all over Taiping with a width of 20 thousand kilometers.
There are no relay stations abroad.
Origin: It is produced all over the world.
Fluorite, also known as fluorite, has a chemical composition of CaF2, and its crystal belongs to an equiaxed halide mineral. It emits blue or purple fluorescence under ultraviolet rays, cathode rays or heating, hence the name. Crystals are often cubes, octahedrons or cubes with twins, and the aggregate is granular or massive. Light green, light purple or colorless and transparent, sometimes with rose red and white stripes, with glass luster, transparent to opaque. Octahedral cleavage is complete. Mohs hardness 4, specific gravity 3. 18. Fluorite mainly occurs in hydrothermal veins. Colorless and transparent fluorite crystals occur in caves of granite pegmatite or fluorite veins. The total reserves of fluorite in the world are about 654.38 billion tons, and China is one of the countries with the largest fluorite minerals in the world, accounting for 35% of the world's reserves. According to archaeological excavations, Hemudu people in Yuyao, Zhejiang Province chose fluorite as an ornament 7000 years ago. There is indeed a fluorite mine in the south of Hemudu. Location: Zhejiang, Hunan, Fujian and other places. Other major producing areas in the world are South Africa, Mexico, Mongolia, Russia, the United States, Thailand, Spain and other places. Fluorite can be used as a flux in metallurgical industry and as a raw material for manufacturing hydrofluoric acid in chemical industry.