Posts Tagged ‘Chemical Composition’

What Is Iolite?

Sunday, January 24th, 2010

Here is a little history on Iolite gemstones, these stones are a precise gemstone that is a miscellaneous group of stones that has a varied content or scope.  These Iolite stones can last a long while and can with stand the adverse effect and wear.

The Iolite is an inorganic substance in nature, it’s said to be a substance that occurs naturally in rocks and in the ground and has its own characteristic appearance and it’s on chemical composition.  

This Iolite stone is a mineral that is a purplish blue in color or gray mineral and has aluminosilicate mineral  containing magnesium and iron mixed in it. The Iolite stones are said to be found  in slightly different colors from blue to a violet light blue.

These Iolite gemstones are describe as rock being formed under the conditions of very intense heat and are produced by the solidification of volcanic magma on or below the Earth’s surface.  Iolite crystal gemstones will form when the magma of aluminum sediments have mixed together and the mixture cools.

The most worthy Iolite gemstones are those with a variation of smooth purplish blue colors that is leaning towards the violet overtones.

Like many gemstones, the accumulation of natural gemstone materials can be found in Asia as well as in Africa. The Vikings were one of the earlier people to use these gemstones and it is said that there may not be very many mines in Norway and Greenland that have not been emptied.

Pleochroism, is known as the transmission of the different colors in Iolite gemstones that has the trait in some crystals that can transmit different colors when viewed along there different axes, you may be able to see at lest three colors at one time if the stone is turned just right so the light can shine through it.

Patricia Pearce has been fascinated by jewelry for many years. She does extensive research for her website http://patsjewelryoasis.com and for her jewelry blog at http://patsjewelryblog.com. For more info about jewelry, join us at her blog.

Article Source:http://www.articlesbase.com/jewelry-articles/what-is-iolite-1771453.html

History about Synthetic Diamonds

Wednesday, November 11th, 2009

Some of the real and original diamonds have a history that is not as well-known and clear, and they only add to the romance and mystique surrounding them. But this is not the case in synthetic diamonds. There is something so exciting about the synthetic diamonds. They have well-documented histories and we know where they came from, and who produced them and when.

The motivation to create man-made synthetic diamonds resulted from the desire of scientists and researchers to improve technology at a much lower cost than the expensive mined real diamonds. The synthetic diamonds are a cheaper and more readily available solution when compared to the real diamonds. They are a boon to both the world of gemstones and the world of technology.

Synthetic diamonds look like real diamonds but do not have all the same properties as real diamonds. It is extremely difficult to differentiate the characteristics such as chemical composition, hardness, weight, brilliance, luster and some of the light handling characteristics of real and synthetic diamonds with the naked eye. Synthetic diamonds have some properties such as durability similar to the real or mined diamonds.

In the past cut glass was probably the first material used to simulate a diamond. It is readily available, easy to cut and polish. The synthetic diamond made of cut glass looks good when seen from a distance, and is extremely low cost.

The use of cut glass has widely been replaced by the most popular diamond alternative, cubic zirconium. Cubic zirconium has been the most widely used material for synthetic diamonds since 1976. Its low cost, durability and light handling characteristics have made it extremely attractive in producing low cost jewelry. The light handling characteristics of synthetic diamond made of cubic zirconium is so close to that of a real diamond. The annual global production of cubic zirconium diamond reached 50 million carats by 1980. Cubic zirconium diamonds weigh about 1.7 times more that of real diamonds, and have the hardness rating of 8.5 to 9 which is bit less than the real diamond.

Henri Moissan is the first one to create a man-made diamond using moissanite or silicon carbide in a laboratory in 1892. Moissanite is a naturally occurring mineral that is a little softer than real diamonds but has almost all of the other properties of a mined real diamond. Charles and Colvard introduced gem-quality moissanite jewelry in 1998. Moissanite has almost the same thermal conductivity as a diamond. You need a highly specialized equipment to differentiate a moissanite diamond and a real diamond. JamesAllen.com states that synthetic moissanite diamonds made from silicon carbide gained widespread use beginning in 1999. These fakes are so good that standard thermal conduction testers used by jewelers cannot detect them. They also sell for nearly as much as the real thing. There is a key to identify a moissanite synthetic diamond – You can see double facets or a doubled table reflection, when you look this synthetic diamond through a 10x loupe. The synthetic moissanite diamonds have a greater density, weighing more than a comparable diamond.

The only way you can be sure to differentiate between a genuine diamond and a high quality synthetic diamond on the market is based on the citification and some simple and more conclusive tests.

Nisha is a Copywriter of precious stone. She written many articles in various topics.For more information visit:koh-i-noor diamond. contact she at <a rel="nofollow" target="_blank" href="mailto: malar.article@gmail.com“>malar.article@gmail.com

Article Source:http://www.articlesbase.com/jewelry-articles/history-about-synthetic-diamonds-1446545.html

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