Tanzanite Sapphire This is a world-recognized emerging gem. One of the seven jewels recognized in the world. There are very few people who have heard of tanzanite in China. Most people only know diamonds and red sapphires. This new gemstone was discovered in Tanzania in 1967. It is produced at the foot of Kilimanjaro, a world-famous tourist spot near the northern city of Arusha. This is the only place of origin in the world.
It is said that the lightning ignited a grassland fire. After the fire, the earthy ore that was originally mixed with other stones turned blue. The Marseille nomads who passed the cattle here will collect this lovely blue crystal. After the news came out, jewelers looking for new varieties came to explore. In 1969, Tiffany of New York named the jewel, Tanzanite, in the name of the country of origin, and quickly pushed it to the international jewelry market. American women who like to pursue novelty immediately became their buyers.
The largest market to date is still in North America. 80% of the annual production of Tanzanian blue is sold to the United States, up to more than 300 million US dollars, followed by Europe. It is said that Hong Kong also has a small amount to sell. This rare gemstone is azure blue, some slightly purple, and some look from different angles or blue or purple or golden. Tanzan Blue looks clear and warm, and some people compare the light-colored tanzan blue to the eyes of the famous movie star Taylor. Because this gem is less hard than red sapphires, some people think it is only a semi-precious stone. But because of this, it is cheaper and easier to process. It can be cut into a variety of shapes, and the volume is large, so the jewelry made is particularly eye-catching and won the love of Ms. In particular, when people learned that the "heart of the sea" worn by the movie star Winslet in the Titanic was tanzan blue, the market price continued to rise.
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The Waterproof Zipper is a special Nylon Zipper. The main treatment methods include TPU film, Polyvinylchlorid (referred to as PVC), water repellency soaking, and waterproof zipper coating.
Let's take a look at their knowledge, sources, uses, and more.
1, TPU film waterproof zipper: as a high-end waterproof zipper, with cold resistance -40 ° C, high temperature resistance 100 ° C, waterproof, breathable, low temperature, soft and other advantages, has been praised by domestic and foreign customers. TPU is an environmentally friendly polymer. The Chinese name is thermoplastic polyurethane, also known as waterproof and moisture permeable film. It is a major breakthrough in the application of new environmentally friendly materials to waterproof and breathable fabrics. It overcomes many defects of PVC waterproof zippers. TPU waterproof zipper has most of the characteristics of rubber and ordinary plastic, but also has excellent physical and chemical properties, so it is also called future material.
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