TOPAZ GEMSTONE INFORMATION, NOVEMBER BIRTHSTONE! TOPAZ JEWELRY ITEMS!

Topaz Gemstones!

The mineral topaz is a silicate of aluminum and fluorine with the chemical formula (AlF)2SiO4. It is orthorhombic and its crystals are mostly prismatic terminated by pyramidal and other faces, the basal pinacoid often being present. It has an easy and perfect basal cleavage and so gemstones or other fine specimens should be handled with care to avoid developing cleavage flaws. The fracture is conchoidal to uneven. Topaz has a hardness of 8, a specific gravity of 3.4-3.6, and a vitreous lustre. Pure topaz is transparent but is usually tinted by impurities; typical topaz is wine or straw-yellow. They may also be white, gray, green, blue, or reddish-yellow and transparent or translucent. When heated, yellow topaz often becomes reddish-pink. It can also be irradiated, turning the stone a light and distinctive shade of blue. Mystic Topaz™ is manufactured by Azotic Coating Technology, Inc., a laboratory that deposits a thin layer of titanium oxide (via physical vapor deposition) on natural topaz which results in optical interference patterns that showcase a rainbow of colors.

Topaz is found associated with the more acid rocks of the granite and rhyolite type and may be found with fluorite and cassiterite. It can be found in the Ural and Ilmen mountains, Czech Republic, Saxony, Norway, Sweden, Japan, Brazil, Mexico, and the United States.
The name "topaz" is derived from the Greek topazos, "to seek," which was the name of an island in the Red Sea that was difficult to find and from which a yellow stone (now believed to be a yellowish olivine) was mined in ancient times. In the Middle Ages the name topaz was used to refer to any yellow gemstone, but now the name is only properly applied to the silicate described above.

Topaz is also the birthstone of November.
The source of this article is Wikipedia, the free encyclopedia. The text of this article is licensed under the GFDL

How to Generate More Income

Help for Senior Citizens:

Avoid scams, more...

Medical Resources:

Post nasal drip, lose weight, diabetes, Alzheimer's, more

Household Tips:

how to clean athletic shoes, get rid of roaches

Guides for Better Living

How to Cope with Life's Problems