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Common topaz in its natural state is colorless, though trace element impurities can make it pale blue or golden brown to yellow-orange. Topaz is often treated with heat or radiation to make it a deep blue, reddish-orange, pale green, pink, or purple. Topaz is a nesosilicate mineral, and more specifically, an aluminosilicate mineral.
About Topaz. View Gallery. Topaz actually has an exceptionally wide color range that, besides brown, includes various tones and saturations of blue, green, yellow, orange, red, pink, and purple. Colorless topaz is plentiful, and is often treated to give it a blue color.
- geology.com
- › Gemstones
Physical Properties of Topaz. One of the best-known physical properties of topaz is its hardness. It has a hardness of 8 on the Mohs hardness scale, making it the hardest silicate mineral. Every student who takes a physical geology course learns about the exceptional hardness of topaz.
Topaz is a rare silicate mineral that occurs in a wide variety of colors. It is one of the most popular colored stones and measures 8 on the Mohs scale for hardness, meaning that it can be worn safely as jewelry in many everyday situations.
6 days ago · Topaz Description. This selection of gems from Ouro Prêto, Brazil, and Russia's Ural Mountains, displays the golden orange to pinkish red color range of precious topaz. The gems range from 7.61 to 14.33 carats in size. Many consumers know topaz as simply an inexpensive blue gem.
By Joel E. Arem, Ph.D., FGA, Barbara Smigel, PhD. GG, Donald Clark, CSM IMG, International Gem Society. Topaz is a semiprecious gemstone made of aluminum and fluorine. Although frequently associated with golden yellow and blue, it can be found in a variety of colors including colorless.
The Gemstone Topaz. Topaz makes an ideal gem. A good hardness and desirable colors, combined with a relative abundance and availability makes it one the most popular gemstones. The most valuable colors of Topaz are the golden orange-yellow type, called Imperial Topaz, and the dark pinkish-red and orange-red colors.
The ancient Greeks believed topaz had the power to increase strength and make its wearer invisible in times of emergency. Early discoveries of topaz from Brazil adorned the jewelry of the 18th and 19th Century Russian Czarinas, earning the stone the moniker of “Imperial Topaz.”
