Topaz jewelry is very elegant and modern. Some people believe that topaz jewellery holds paranormal powers that have been used for centuries. The orange topaz is the birthstone for those that are born in the month of November and state gemstone for the US state of Utah.
The word'topaz' came from the Greek ??p????? ( ??pzi?s ), who is the author of one of the first systematic treatises on minerals and gemstones. [**] some say that the word'topaz' was derived from'Topazos', which is an island in debt Sea and is now called Zabargad.
Topaz is a mineral that is valued as gemstone and is often found in association with granitic rocks. Its Moh's toughness is eight and its specific gravity is 3.4-3.6. Its distinguishing characteristic is its perfect basal cleavage. Meaning, it has got a cleavage that is parallel to the base of the crystal structure or to the lattice plane which is standard to one of the lattice axes.
Topaz colors are infrequently clear. [**] customarily, it is tinted by impurities, thus, having the color brown, orange, red, blue, pink, wine yellow or straw yellow, or pale grey. The most common color is yellow with a red tint, while the most valuable is pink to reddish.
Using heat treatment, irradiation process and coloring agents,eg iron and chromium, a typical topaz can be turned into a different color.
It is the most sought-after and highly valued of all natural topaz because it's a relatively rare variety. However, it is delicate to sunlight and its color can fade when exposed to it for an extended period of time.
The orange topaz is perceived as precious topaz and is the birthstone for those that are born in the month of Nov. Orange topaz is Utah's state gemstone, while blue topaz is the state gemstone for the US state of Texas.
Natural blue topaz seldom happens. The majority of the blue topazes are augmented drab, grey or pale yellow topaz. This is done through heat treatment and irradiation, a process by which a colorless, gray or pale yellow topaz is exposed to radiation so that its optical properties are boosted.
Most of the pink topazes are yellow topazes that have been heat-treated to turn pink. It is primarily found in Mexico.
This is not a natural topaz. It's a colorless topaz that has been artificially treated with a thin film or coating to give the required rainbow effect.
The most valuable variety of topaz can be found in Brazil, Pakistan and Russia.
Topaz may also be found in Thomas Range in Utah, in San Diego County, California, and near Topsham in Maine. Colorless and light-blue topaz varieties have also been found in Texas, in Precambrian granite in the Llano Uplift in Mason County. Though, there's no commercial mining of topaz in that area.
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