The general custom metal

The general custom metal the outside and so on money natural materials (mineral, rock, biology and so on) makes, has certain value jewelry, the handicraft or other collections is called as the jewelry, therefore has “the gold, silver and jewelry” the view, manages these goods the jewelry line to be also called as “the jewelry line”. Scientifically speaking, “jewelry”Choose plate heat exchanger
and generalized “gem” the concept is the same. The generalized gem makes a general reference these being suitable to carry on ponders over either the carving processing for the jewelry or handicraft raw material.
Jewellery or jewelry is a form of personal adornment, manifesting itself as necklaces, rings, brooches, earrings, and bracelets. Jewellery may be made from any material, usually gemstones, precious metals, or shells. Factors affecting the choice of materials include cultural differences and the availability of the materials. Jewellery may be appreciated because of its material properties, its patterns, or for meaningful symbols. Jewellery differs from other items of personal adornment in that it has no other purpose than to look appealing. Items such as belts and handbags are considered to be accessories rather than jewellery.
The gem, must have the following several characteristics: Cat's eye stone “US”, namely gorgeous crystal clear, brilliant. If the gem is not beautiful cannot become the gem, this kind of US or performance for gorgeous color, either the performance to be transparent and be pure, either special optical effect (for example phenomena and so on cat eye, play of color, night light), either special design (for example chrysanthemum rocks and flowers, agate, plum blossom jade and so on). For example with is the diamond, the transparent few flaws may use for to ponder over the precious diamond, but the transparency difference, the multi-flaws, the color black can only serve as the raw material for industry.
The word jewellery is derived from the word jewel, which was anglicized from the Old French "jouel" circa the 13th century. Further tracing leads back to the Latin word "jocale", meaning plaything. Jewellery is one of the oldest forms of body adornment; recently-found 100,000-year-old beads made from Nassarius shells are thought to be the oldest known jewellery.


Jewellery is sometimes regarded as a way of showing wealth and might also possess some minimal functionality, such as holding a garment together or keeping hair in place. It has from very early times been regarded as a form of personal adornment. The first pieces of jewellery were made from natural materials, such as bone, animal teeth, shell, wood and carved stone. Some jewellery throughout the ages may have specifically been as an indication of a social group. More exotic jewellery is often for wealthier people, with its rarity increasing its value. Due to its personal nature and its indication of social class, some cultures established traditions of burying the dead with their jewellery.
“long time”, namely quality of material hard wear-resisting, can prolonged invariable. Because the gem value is high, the people expected inevitably it can be durable, may maintain the value even the hereditary goods. The reason that the diamond becomes the most expensive gem, a reason is it is in the world is hardest, did not fear that the corrosion the gem,cheap wedding dresses died on the value high gem many for some degree of hardness big, the anti-corrosive silicate mineral (for example jadeite), the minority oxide compound (for example ruby, sapphire) and the simple substance mineral (for example diamond), but the nature soft, is corroded easily the gem (for example cave jade, south jade and so on) the itself value was low, commonly used in manufacture handicraft, by labor win; But also has the minority gem not in this row, like Ou Bo, pearl.