A 53.73ct Royal Blue Tanzanite
Lot No. ：AAARS-T-200320
Grade：Natural Tanzanite*(GIA) , 5A.
* With few inclusions, by 1970, the royal blue find was soon the focus of American and European publicity. When word of the new gemstones got out, Henry Platt of Tiffany and Co. named the new gem “tanzanite”. Tanzanite is the blue and violet variety of the mineral zoisite belonging to the epidote group. Tanzanite is noted for its remarkably strong trichroism, appearing alternately blue, violet and burgundy depending on crystal orientation.(In its rough state tanzanite is usually colored a reddish brown, and much of it requires heat treatment to remove the brownish "veil" and bring out the blue violet of the stone.) D’Souza’s discovery is one of the most exciting in the field of gemstones in nearly a century. Of all the new gemstones that have conquered the hearts of people in the second half of the twentieth century, none has even approximated the success of tanzanite. Within a short period of time it has succeeded in achieving worldwide popularity and major acclaim. Tanzanite has become one of the most popular gems in the market place. In fact, it is now the most popular gemstone after the “big four,” which consists of diamonds, rubies, sapphires and emeralds. Today, tanzanite can cost over $2000 per carat in larger sizes at retail stores. Tanzanite is far less expensive than sapphire, for which it often serves as a substitute. Given its attractive color, rarity and the publicity, which greeted its discovery, the value of tanzanite is quite high, just a little less than that of the violet-blue sapphires it resembles. But it is rarely seen on the market and is very much a collector’s item. Tiffany's has one of the largest and most beautiful displays of tanzanite in the world. The Smithsonian Institution also has an impressive collection consisting of one faceted stone of 122.7 carats and a rare cat's eye tanzanite of 18.2 carats.
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