Topaz


Topaz is a very popular gemstone composed of aluminum silicate. [1]

Images of topaz

Topaz: Quick Facts and Characteristics

Some quick facts for Topaz:
  • Transparency: Topaz can be opaque, translucent or transparent.
  • Crystallography: In terms of crystallography, topaz is orthorhombic.
  • Luster: In terms of luster, topaz is vitreous (glassy).
  • Streak: Topaz streaks colorless.
  • Hardness: Topaz's hardness is 8 on the Moh's scale.
  • Specific Gravity: Topaz's specific gravity ranges from 3.5 to 3.51.

Topaz: Background and Summary

Topaz is a mineral that belongs to the silicate family. It is a popular gemstone, renowned for its beautiful colors and excellent clarity. Topaz is commonly found in many locations around the world, including Brazil, Russia, Sri Lanka, and the United States. It is a hard mineral, with a Mohs hardness scale rating of 8. This makes it an ideal gemstone for use in jewelry, as it is resistant to scratches and wear and tear.

One of the main ways to identify topaz is by its color. Topaz can be found in a range of colors, including blue, yellow, pink, and green. The color of the topaz can be influenced by the presence of impurities and trace elements in the mineral. For example, blue topaz is often created by irradiating and heating colorless topaz. Yellow topaz is often found in Brazil, and pink topaz is found in Pakistan. Another way to identify topaz is by its crystal structure. Topaz crystals are often elongated prisms with pyramidal ends.

Topaz has been used for centuries for its beauty and durability. It is commonly used in jewelry, such as rings, earrings, and necklaces. Topaz is also used in decorative objects, such as vases and figurines. In addition to its aesthetic uses, topaz is also used in industry. It is used as a component in electronic devices, such as sensors and switches. Topaz is also used in the production of abrasives, such as sandpaper and grinding wheels.

Topaz: Table of Properties

Attribute Topaz (src)
Transparency transparent, translucent, opaque
Chemical Formula Al2SiO4(F,OH)2
Chemical Composition aluminum silicate
Specific Gravity 3.5, 3.51, 3.53, 3.54, 3.56, 3.56, 3.57, 3.57
Hardness 8
Streak colorless
Crystallography orthorhombic
Refractive Index 1.607, 1.649
Hydrous No
Colors common: pink, red, blue, brown, yellow
sometimes: green
less common: tan, gray, pale, beige, white, orange, purple, colorless, multicolor
Category nesosilicate
Birefringence δ = 0.010
Fracture 1: 1


Topaz: FAQ

Q: Is all topaz naturally colored?
A: No, not all topaz is naturally colored. Some topaz is treated to create or enhance its color.

Q: Can topaz be found in the United States?
A: Yes, topaz can be found in the United States. It is commonly found in Utah, Colorado, and Texas.

Q: Is topaz a birthstone?
A: Yes, topaz is a birthstone for the month of November.

Sources

- Gemological Institute of America. (n.d.). Topaz. Retrieved from https://www.gia.edu/topaz
-
Mineralogy Database. (n.d.). Topaz. Retrieved from http://www.mindat.org/min-3998.html
- Topaz: https://en.wikipedia.org/wiki/Topaz

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