Posted on

Topaz, November Birthstone

Topaz is the birthstone for November. Most Topaz crystals are colorless, however topaz crystals that are sold in jewelry stores are pink, sherry brown, or yellow, blue, gray, green, reddish pink. It’s hardness is 8 on the Mohs scale. Topaz in its natural state is a golden brown to yellow, a characteristic which means it is sometimes confused with the less valuable gemstone citrine. A variety of impurities and treatments may make topaz wine red, pale gray, reddish-orange, pale green, or pink, and opaque to translucent/transparent.

Orange topaz, also known as precious topaz, is the traditional November birthstone, the symbol of friendship, and the state gemstone of the Utah.

Imperial topaz is yellow, pink, or pink-orange. Brazilian imperial topaz can often have a bright yellow to deep golden brown hue, sometimes even violet. Many brown topazes are treated to make them bright yellow, gold, pink, or violet colored.

Blue topaz is the state gemstone of the Texas. Naturally occurring blue topaz is quite rare. Typically, colorless, gray or pale yellow and blue material is heat treated and irradiated to produce a more desired darker blue.

 

Posted on

Topaz, November Birthstone

Topaz is November’s birthstone. It’s also an ideal gemstone for custom-designed jewelry given its brilliantly diverse colors and its hardness.

The name topaz comes from the Sanskrit word “tapaz”, meaning “heat” or “fire”. In ancient times, the Greeks believed that those who wore topaz possessed strength and invisibility. The Romans believed it improved eyesight. The Egyptians believed it protected against injury. During the Middle Ages, topaz was believed to be a healer of both physical and mental sicknesses and even able to prevent death.

In its natural state, topaz is golden brown to yellow. A variety of impurities and treatments may make topaz wine red, pale grey, reddish-orange, pale green or pink (rare) and opaque to translucent and even transparent.

The most sought after and consequently more valuable natural topaz is Imperial Topaz, alson known as “precious topaz”. The color of the setting sun (pink or pink-orange), the name arose with the Russian tsars of the 17th century who claimed their right to all the pink topaz mined in the Urals. The czars might take exception to the fact that today it’s the gemstone of Utah. They would also have to share mining locations with Brazil, one of the world’s largest producers of topaz.

Topaz is also the gemstone of another state, Texas, where it is found in the Precambrian granite of Macon County. For Texas, it’s blue topaz. Naturally occurring blue topaz is considered rare. Typically, to achieve blue, colorless, grey or pale yellow topaz is heat-treated.

Another topaz you might have heard of is Mystic Topaz. It is a colorless topaz artificially coated using a vapor deposition process to render a rainbow effect.

Topaz is 8 on the Mohs hardness scale. Given its relatively low index of refraction, do not expect large-faceted topaz to sparkle as readily as a diamond. Do expect it to be durable and lasting.