Many people wear gold jewelry after a period of time, found that change color or fade, many people think that this is the insufficient in assaying the fineness of gold jewelry, then store bargaining or complaints to the consumer association, however, was told that fade gold jewelry is not in assaying the fineness of gold jewelry, but the other reasons, so, this is precisely what reason? Gold jewelry color or fade with the body’s sweat has a close relationship. People sweat moisture is 99%, and 1% is the body of waste and harmful substances in the body, such as: chlorinated, lactic acid, urea, ammonia, etc. These substances with gold jewelry in silver and copper after contact, can produce chemical reaction, the silver chloride and copper sulfide, and render the deep black chemical salts. This chemical salt often fall off from the gold jewelry, pollution of the wearer’s skin, make the skin very obvious black stains. The cosmetics have become an indispensable one of the “character” of people’s life. If daub Van Cleef Arpels bracelet replica is on gold jewelry worn parts of the skin, so to cosmetics containing chemical substances and undoubtedly the most afraid of chemical erosion gold jewelry “last elected” provide opportunities, the results can think of. Some cosmetics, but also includes some subtle grain, it can constitute another type of dirt, so as to wear gold jewelry. Regional environmental factors may also lose gold jewelry bright beautiful colour and lustre. Such as: the dry region, contains more original fine dust in the air, after pick up the human body can form a kind of “human sandpaper”, it can put the gold jewelry abrasive wear out very fine clastic, a local black stains, etc. It is worth mentioning, talcum powder or cream also contains similar particles, also like these make gold jewelry in the shade. The white jade on the market, and fire mingled. Some operators will not white jade, white jade are known as the white jade, objectively misled consumers. In our country, white jade is a specific varieties of jade, is a specific name white nephrite. Soft jade has been made in xinjiang’s hotan, in the field, so often referred to as hetian jade, in Tian Yu. Nephrite because of differences of mineral and chemical composition and leads to different color, so the nephrite jade, white jade, in addition there are jade, black jade nephrite breed named because of the color. The main mineral of the nephrite jade of tremolite and actinolite, both content is changed, then there will be a small amount of other minerals, when the nephrite jade of tremolite content reaches more than 95%, “due to the genesis of low iron through flash is white, the white is nephrite jade, white jade is high-grade jade, like tempered suet, known as” suet jade “, is extremely rare nephrite jade varieties. White jade for its precious and was deeply loved by people. All in all, white jade white jade of tremolite; By other minerals as the main form replica Van Cleef Arpels necklace of jade, must not be called white for the color white. Why, then, will happen “random” named “white jade”? There are mainly two reasons, first, some operators also don’t understand white jade specifically composed of tremolite nephrite, but named according to color; Secondly, deliberately called is not white jade, white jade white jade, true, this is illegal behavior. In the jade market, often have two kinds of white jade, known as white jade. One is quartzite type of jade, color white, fine, look like a white jade, the so-called “Beijing jade” in the past, is a kind of fine grained quartzite, geological mining sector “sharpening stone” in the evaluation of ore, grain is very fine, but can not be called white jade, quartzite jade hardness is higher than white jade, so white jade show stronger vitreous luster, in the absence of instrument to detect, can decide accordingly. Second, calcite kind jade, approximate white jade appearance, cases of the so-called “Afghanistan white jade” on the market is formed by calcite jade, is actually a kind of marble, only the color is white, translucent, often carved Chinese cabbage, moral symbol “hundreds of goods”. The jade hardness is low, the ordinary knife to carve, is not difficult to identify. Especially it should be noted that some of the flea market often with glass as white jade or gu yu, glasses and the usual to see the size of round bubble. As long as saw a bubble can certainly not white jade. Glass products, however, some also no bubble, so no bubble is not real. To do safely buy the real thing, or should find jewelry jade inspection department to detect, because some white jade looks like a white jade, not tested strictly, it is difficult to make accurate judgment. There are many different kinds of jewelry family, both precious jewels, as well as an Cheap Van Cleef & Arpels Alhambra ring ordinary jewelry. The products mainly include: Beautiful diamond a extremely rare, and precious stones, it is radiant, bright brightness, is known as the “king of the gem”. Diamond has a very high hardness and high degree of refraction, can cut cut any material, without damage by other substances, can reflex the light outside, charming bright light. As a gem grade diamond, limited to colorless, close to white, yellowish, pale yellow, yellow wait for a few kinds, and especially in the crystal clear is the best. Emerald crystal clear, clear and bright, because contain a small amount of chrome, but brilliant beauty eyepleasing green glow, is the most precious emerald, and the most charming, known as the king of the “green treasure”. Emerald output, the price is expensive, high quality emeralds, its value can be comparable to the diamond. Colombia, Peru and the urals is the main origin of the former Soviet union. ruby Known as the “rose violet jewel”. Ruby because of containing chromium ion and presents a variety of different shades of red, with red, rose, rose violet, pink, pink, dark purple, etc., which is the best in blood red. When some impurities in accordance with the gem ruby internal structure arranged regularly, in under the irradiation of light source, can reflect a kind of beautiful shot six stars, commonly known as the six lines, also called the rose line. Burma is one of the world famous rubies. sapphire Because of containing iron and titanium ions in blue. According to the different shades of color can be divided into ocean blue, dark blue, bright blue, blue, etc, especially in the ocean blue for top grade. Top grade sapphire can produce beautiful shot six stars, called the “starlight Fake Van Cleef Arpels earring sapphire. Sri Lanka, myanmar, Thailand, Australia is the world’s leading producer of sapphire. The cat’s eye stone Also known as cat ‘s-eyes, chrysoberyl, sparkling stone, with color. When the gem exposure to light, the surface will show a like cat’s eye flash of white stripes, rock surface, with the shaking of stripe and the changes with the strength of the light. The cat’s eye stone is very rare, precious, with colour and lustre is bright yellow kwai is the best. Sri Lanka is the place where is rich in the cat’s eye gem. Pearl belongs to organic material gem. By the mother breeds of pearls is very soft, when the light will be scattered overflow special bright luster. Jade, known as “jade” reputation. Its color, especially in the most brilliant green beauty, including pure green translucent is known as “post protecting”, are the ultimate in emerald. Jade quality of a material is exquisite, the warm feeling when in contact with the skin, makes the jade has been for the emperor rich love. Burma is the leading producer of jade in the world.