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Two of the most rare and expensive gemstones in the world Majorite - a rare form of purple garnet. Majorites may be formed under impact force of fallen meteorite (created at the moment of a sizeable meteor impact), or under the ground at depth of at least 400 km! Named in honor of geophysics Alan Major, who investigated the formation of garnets under ultrahigh pressures. First majorite was found in 1970 in meteorite Koorara near the Yecla town, in Western Australia. In 1990 were found a few large crystals of this stone in Madagascar, in the near Bekili. Several exemplars over the next decade have been found in Russia, Turkey and the United States. The most recent find is dated 2004, when in France, in the region of Shantoneo was found about a thousand of mica shaped crystals, faceted and subsequently sold at the price of $ 2,400 per carat. The most expensive to date purple garnet majorite, weighing 4.2 carats, was sold in 2003 for 6.8 million dollars. It can be assumed that in process of humanity development on Moon and Mars, majorites will cease to be unique and rare, as on the Moon and Mars are much more favorable conditions for their formation, ruby diamond rings. Tanzanite Tanzanite is a blue-purple variety of the mineral zoisite. Released relatively recently, in 1967, it became the most popular precious stone, which is widely used in expensive jewelry. Today, it is assumed that tanzanites can be found only in the region of Arusha, Tanzania (Africa), from this region tanzanite got its name. Color: Blue, Blue, Purple. Mohs hardness: 6.0-6.5 Tanzanite is fragile stone. There are many cases when jewelers while jewelery production, refused to insert tanzanites, because were afraid to break off the stone which cost thousands of dollars. This gem in no case can be put in ultrasonic cleaner for jewelry, because of ultrasound in water tanzanite stone cracks. Tanzanite cost is about $ 1,000 per carat The main advantage of tanzanite is its wonderful rich color. Color tints which has this stone are in the range between blue and violet spectrum. Under different angles tanzanite stone glints with different color saturation, buy tanzanite rings. Thus the determination of the optical axes of stone, faceting planning, all these steps are very important while tanzanite faceting. Tanzanite stones are so rare because are mined only in Arusha, in Tanzania. Scientists say that before 15-20 years will be exhausted all reserves of this stone.
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