Education and Care of the Gems
Tanzanite is the gemological varieties of blue - purple color of the sub-group of zoisiti. It 'a pleocroica gem, or more exactly tricroica. This means that each of Tanzanite Crystal has three colors: blue, greenish yellow-red-violet and brown (bronze), whose intensity changes when viewed from different angles It has a good degree of purity under the magnifying lens. This is an important aspect, because high transparency and virtually no inclusions accentuates its beautiful colors that are the hallmark of this gemstone.
Tanzanite, unlike any other gemstone, can boast a discoverer: Mr. Ndugu Jumanne Ngoma. He found tanzanite in Merelani, Arusha in Kiteto area in early January 1967.
History tells us that Mr. Ndugu He was going to visit relatives who lived in that area, when strolling at the foot of the hills scattered on the ground saw some blue crystals. They were beautiful, transparent and within a few hours he collected many, selecting the most beautiful 5 kg.
He decided to go to Nairobi, 300 kilometers from Arusha, where the trade in gems was much more developed and is presented to a company that specializes in the trade of gems and showed them his new discovery. They had never seen anything like it. They told him that they would investigate the nature of the new mineral and, as soon as they knew what it would have informed. He did not know anything. Then contacted the mining inspector of the area, ask for a detailed analysis; Shortly after he sent some samples for detailed analysis. After 10 months he received the answer, in which he certified that what he had discovered was not a new mineral, however, was a new variety of zoisite: blue zoisite. The inspector He confirmed the scientific value of the discovery, but from an economic point of view, this gem had no market. After about a year, it was learned that another person, precisely Manuel D'Souza, who literature is wrongly recognized as the discoverer of the tanzanite, not only was collecting tanzanite in the discovery area from Sign Ndugu, but was saying to be the discoverer. For years Mr. Ndugu told the true version of events. finally in 1984 the Government of Tanzania recognized the truth; the real discoverer of Tanzanite was him.
Immediately after the discovery would pose the problem of giving an appropriate name.
You know, as I said earlier, that it was a new variety of zoisite and it was decided to market it under the name of Blue zoisite, but in English the term zoisite resembles the word suicide and the idea was abandoned. The name tanzanite, now entered the global common language, was coined from scratch by Maison Tiffany of New York in 1967, to be identified clearly and to define the only area of origin, precisely Tanzania.
Tanzanite is employed exclusively in the field of gemology. The cut stones, now marketed in nature occur in various colors: blue, green, yellow, pink, Brown and khaki. All these shades of blue, then turn in your favourite colour, following a careful heat treatment, only natural. The heating is done at 380 degrees, and any significant rise beyond this temperature would damage the stones.
To take care of this gem the best way to clean it and make it like new, it is to use warm water with mild soap holder and a toothbrush with soft bristles. Do not subject the Gem to drastic changes in temperature, as it could be damaged.