Natural Tanzanite Stones
Natural Tanzanite Stones is heated approximately 99.99% of Tanzanite (blue zoisite) to get the characteristics of saturated jewel Blue Purple. Actually, most of people will tell you that it’s not tanzanite, until it is heated to the color group. However, although rare, Blue-violet natural tanzanite.
Tanzanite for natural color, you must buy Rough, says Tanzanite marketing expert and owner and sales in New York. “Pack you buy Rough, because people are usually difficult to treat with the rough.” Heating Rough break can be extended or lead to an explosion of incorporation, and leads both in the largest waste and small stones. “You want to cut off all cracks and inclusions can lead to” recommendations, they advises.
If you find that the natural color of tanzanite stones are usually very large. “Especially in the large stones, and there is plenty of Rough, you can cut into a natural”. Large Rough hold less color than the best products after cutting, which is true for any jewel, heated or not. “If you’re heated, and it will be a pure blue, and thus easier to sell. But it is a large piece of raw tanzanite intelligent cut without heating? The market is not demanding a natural tanzanite expensive.
This is what we do not see a lot of primary cause natural color tanzanite. Scarcity(Rarity) is not a big problem. “If I bought a kg Rough, what I could not put the market, only natural tanzanite, ah ……” but the meaning is clear: it is not interested No, if no one wants to do it. “There is no market there for Natural Tanzanite. Everyone agreed with heated Tanzanite due to its color.”
Natural Tanzanite Price :–>
In the past year, “the original stone (Rough Tanzanite) prices have increased dramatically,”. “Now it has stabilized in recent months.” At this time last year, and the price was $270/carat. For $ 330/ carat for High end color. Asking price today to $455/carat to $550/carat.Even heard, some of the largest Dealers demand $550/carat for 3.4, and 5-carat stones in Super Purple Color.
Afgem, signed a professional mining operations in Block C of the Merelani tanzanite mines, can produce more of its mines. While its cargo in South Africa, it seems to almost $550/carat. This seems to give control of the company, allowing it to raise prices.
But with the rise in Rough prices above, not everything is rosy. “Demand is down, but the supply is very down,”
Afgem is a big buyer in this area, but also has its own production. If a great power is available, as in the past, Afgem will not buy enough goods to have an impact on the market.
These mines are hard at work, and the production is limited, and really the only site Merelani for tanzanite business. It is estimated that the site is possible from 300-500 meters deep, and Afgem may be the only company that has the ability to dig much.
Tanzanite dealing company can cut and insure with GIA certification of authenticity that Tanzanite is natural, but the lack of a market. “It is all about color,” “People really want to saturated blue without green and brown.” If you not treat heating, chances are you will not be get super saturated blue without yellow.
Identificitation :–> Heat treatment can be performed on the Rough, noted one famous gems identification laboratory director, director advise heat up to 450 degrees Celsius. More than 400 degrees Celsius improve, thereby heating the Rough, although it should not be a lot of damage.
This means that anyone trying to identify that better be proficient in Tanzanite. There are two ways, explains the technology lab jewel expert in Geneva in identification of heated tanzanite.
First, using UV-Vis spectroscopy, using a spectroscope (dichroic mirror), it is checked in the UV and visible spectral peaks. Zoisite is naturally opaque to ultraviolet light rays, but heating treatment creates a small transmission window. For a well equipped laboratory, test the transmission of UV rays is easy and 100% positive test. However, most are not equipped with a small laboratory or are not familiar with this type of identification.
For the retail jeweler, and there is a relatively simple test, but it’s not entirely accurate, warning Jewel Expert. It consists of the use of dichroscope study revealed three pleochroic colors found in tanzanite.
Three colors are violet(Purple), blue, greenish-brownish-yellow. Violet discovery despise Alpha direction of the axis of the crystal, and the direction of the blue discoveries in beta, yellow found in the gamma direction axis to search. If there is no yellow, it means Tanzanite stone is Heated. Remove the yellow adds an additional element of the direction of the blue. Seeing the yellow pleochroism color is strong evidence that stone is not heated.
The test is 90% accurate, seeing yellow color depends on the quality of the dichroscope. By the help of calcite scope, you’ll see a greenish-brownish-yellow in unheated zoisite.Using a Polaroid dichroscope, you will most likely see Brown.
The History of Natural Tanzanite :–>
1967 – Discovered in Tanzania
1968 – Christened ‘tanzanite’ by Tiffany & Co.
1999 – Tanzanite is announced the world’s favourite coloured gemstone
2002 – Tanzanite is named the December birthstone
In Around 1805, the mineral zoisite was found in the Austrian area by a well known Baron. Later this mineral Baron named because the discoverer of the metal. Mineral Zoisite is brown in general, tend to almost completely opaque.
Tanzanite Zoisite was discovered in Tanzania, Africa in the late 1960s originally was thought to be sapphire crystal, but it was determined at a later date not be the case.
Tiffany comes Tanzanite name, because they have the exclusive right for the first metals, even if they are no longer the exclusive property of stone. Tanazite is a beautiful color blue and purple from the ore which is great and highly sought and expectations.
Tanzanite is a variety of zoisite and comes in blue, pink, yellow, green, brown, khaki and natural tones. Beautiful even in its natural state, it is generally the production of heat treated to produce Sapphire blue, amethyst, Blue purple(Blue violet) is highly desirable. The main source of the Tanzanite stone in all over world is Tanzania.
Found in northern Tanzania Meralani Mountains in 1967, this popular gem is a very strong color. When cutting and polishing stone beauty that is very popular.
It appears in its raw state of the reddish-brown color, but when heated to 600 degrees Celsius, the heat took out a beautiful purple stone.
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