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The very very rare tanzanite has vivid blue, purplish blue and violets blue in color. This gorgeous blue gemstone found in only one place on earth, near majestic Mount Kilimanjaro, the hills of Merelani in northern Tanzania . Blue Violet tanzanite is a variety of zoisite mineral. It was first unearth in 1967.
Mineral : Zoisite
Chemistry : Ca2Al3(SiO4)3(OH)
Colors : Violet blue to bluish violet to violet purple
Refractive Index : 1.691 to 1.700
Birefringence : 0.008 to 0.013
Specific Gravity : 3.35
Mohs Hardness : 6 to 7
A company (Tiffny and Company) first discover this alluring rich blue and deep lilac hues gemstone in Tanzania. Tiffany & Co is known for its interest to discover new unusual gemstones. Tiffany had previously brought commercial success to kunzite in 1902, named for the Tiffany gemologist Georg Kunz and in 1910 morganite, that was named in honor of its famous client John Pierpoint Morgan. In 1974 Tiffany also introduced us to the bright green of tsavorite gems.
Because it mined only in single location until half century ago, tanzanite are often referred as the “Gemstone of the Generation”. Because this gemstone are likely to be the only ones able to buy. Tanzanite gemstones unearthed in Tanzania. It is believed that the mines will be depleted in around 25 years, which means it is becoming increasingly difficult to find large tanzanite’s in the most coveted deep-blue color. Now the tanzanite found in significant quantities in only two places. The second place is Manyara region, Tanzania.
Tanzanite gemstone firstly used by Tiffny and Co. in their jewelry designs.
Tanzanite, like other gemstone is not uniform in color. It ranging from deep velvety blue to light purple. World’s Gemologists and jewellerydesigner’s loves working with all the hues. The most prized tanzanite are vibrant, rich, deep blue with hints of purple. They shouldn’t be too dark but have a sumptuous blue hue.
Approximately 80% tanzanite comes out of the ground brownish in color and it is heated to burn away the muddy tones, leaving only blue, violet and pink hues. We can say it “gently heated” rather than “heat treated”, tanzaniteis exposed to temperatures of around 500-800oC for an hour at most to reveal their blue color, while heat-treated gems like rubies often come close to melting point to achieve a more vivid hue.
There are some rare tanzanite come out of the ground blue or violet, which can usually be attributed to natural heating when the gems are still buried in the Earth. Very occasionally, a tanzanite will display no indication of heating whatsoever, making them the rarest of all tanzanite.
The biggest tanzanite ever discovered was a 16,839-carat rough. It was mined in 2005 atMawenzi after Mount Kilamanjaro’s second highest peak.
Intriguingly, tanzanite displays three different colors when viewed from different angles. Tanzanite show royal velvet blue color when viewed from the top, deep purple from the side and pink red from the other side.
Tanzanite 1,000 times rare than diamonds, eye clean, deep rich color saturation, to classify as top quality. Fine tanzanite has the deepest, richest combination of blue, violet and sometimes even burgundy shades it also depending on how the stone is oriented during the cutting of the different facets, different variations of these colors will show. The very finest tanzanite, the pure blue variety, have a rich, bright electric-blue color.
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