Blue Tourmaline
Blue Tourmaline
China Tourmaline Knowledge And Capabilities
The origins of tourmaline, has an interesting story China gemstone Legend 1703, a warm summer, in Amsterdam, the Netherlands, there are several kids who play the Dutch sailing back to the stone. Suddenly, a child nearly Office found that the stone dust and grass litters have smoked in the past. Children are very surprised, he gave them the parents of view, it was found that stones can attract or exclude light objects such as dust and grass litters. Therefore, the Dutch called it "sucked limestone." Until 1768, Swedish scientists discovered tourmaline Ringnes, people gradually accepted and adopted the present name - tourmaline.
Tourmaline is the usual name of the jewelry industry in china gemstone wholesaler .in mineralogy are tourmaline family. Chemical formula XR3Al6B3Si6O27 (OH) 4, where X is Na, K, Ca, R for various metal ions, R directly affect the type and content of the color of tourmaline. Trigonal system. Showed a complex three-columnar crystals. Color variety, are colorless, rose red, pink, red, blue, green, yellow, brown and black, of which the blue and bright red roses for the top grade. Glass luster, transparent to translucent, usually 1.624-1.644 refractive index, birefringence 0.018-0.040, dispersion 0.017. With strong pleochroism. Hardness of 7-7.5, density 3.06-3.26 g / cc. No cleavage, conchoidal fracture. Tourmaline also has piezoelectric properties and thermal resistance, which is the origin of the name tourmaline.
Tourmaline colorful, beautiful, diverse, transparent, since ancient times is very popular. It is currently second only to emerald, alexandrite's mid-range one of the gems. According to records, the Qing Dynasty Empress Dowager Cixi of the sacrificial victims, there is one made with tourmaline carved lotus, weight 36.8 money, then the value of 75 million taels of silver. People to tourmaline as the "October birthstone," a symbol of happiness and peace.
Value with gem tourmaline albitization prolific in strong and Lithium Mica-based micro-plagioclase albite Danwei Jing Yan's nuclear department. 50-70% of the world's color tourmaline from Baxi Mi that Sijilasi state pegmatites. The U.S., Russia, Sri Lanka, Myanmar and other countries also have output. Xinjiang's Altay china jewelry supplier .produced by tourmaline, crystal clear, color variety, and there within the infrared and green "watermelon skin" treasures.
Tourmaline is a precious mineral, has been the favorite for the Royal, in particular the Empress Dowager Ci Xi, particularly fond of tourmaline. Tourmaline to smooth blood gas, effectively rule out the stress, fatigue, improve health and luck, more evil effect. Demonstrate noble, elegant, gentle and beautiful temperament. Bring you health, luck, fortune and god karma.
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china gemstone wholesaler http://www.winbowgem.com supply vast kinds of styles handmade jewelry,mainly engage in wholesale handmade jewelry such as wholesale crystal ,wholesale pearl ,wholesale gemstone,who...
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Blue Zircon Gems
There are relatively few gemstone varieties with good hardness and brilliance that occur in the color blue. Sapphire is the most famous, and is found in the full range of blues, from the palest blue to blue-black. Blue topaz, produced by irradiating colorless topaz, is the most popular of all blue gemstones, since it is widely available at attractive prices and is found in light and medium-dark tones. Other choices in blue include tanzanite (violet blue) and aquamarine (light blue). Tourmaline and spinel can sometimes be found in blue, but only rarely.
The most brilliant blue gemstone is undoubtedly zircon, which has a higher refractive index than even sapphire, tanzanite or spinel. But zircon is not well known by the general public, who are apt to confuse it with cubic zirconia, a synthetic diamond simulant. Zircon is a natural mineral, zirconium silicate, and is found in a range of colors, including white, blue, yellow, orange, brown, rose and green.
Blue zircon, the most popular color, is produced by heat treatment of brown zircon. But not all brown zircon will turn blue when heated; only some zircon has the right physical structure to turn blue when heated. This is why most blue zircon comes from Cambodia or Burma.
Blue zircon has some unique properties that make it very popular with gemstone aficionados. Not only does zircon have outstanding brilliance, but it also has very strong dispersion or fire, the tendency to split white light into the spectral colors. Zircon also has very pronounced birefringence or double refractivity, where the difference between the two refractive indices is unusually high. This can be often be observed with the naked eye when you look down through the table of a cut zircon: you will observe facet doubling that makes the facet edges looked blurred.
Though blue zircon is a reasonably hard gem, with a hardness on the Mohs scale of about 7 to 7.5, it is somewhat brittle and therefore sensitive to knocks and pressure. Zircon has the tendency to wear along facet edges. Its use in rings should therefore be limited to protective settings or occasional wear jewelry.
Blue zircon can be found in a range of blue tones from very pale to a saturated medium blue. Due to pleochroism, blue zircon can look slightly greenish when view from one direction.
About the Author
GemSelect is a leading online dealer in fine gemstones, including zircon, spinel, garnet, and tourmaline. Blue Zircon Information