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| Natural Topaz Overview: | |
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Topaz is a very hard and is well suited for all jewelry applications. Topaz is readily available in a variety of colors. The most popular colors are blue and white. The richest blue shade of blue, termed London Blue, is the most desired. White Topaz is frequently used as accent stones in jewelry settings. Topaz may be heated or irradiated to enhance color. |
| Legend and Lore: | |
| Because of its wide availability Topaz has been one of the most prevalent gemstones throughout history. | |
| Physical Properties: | |
Color:
|
Variety |
Refractive Index:
|
1.619 - 1.627 (+/- 0.010) |
Pleochroism:
|
Weak to Moderate Depending on Color |
Chemistry:
|
Aluminum Silicate Fluoride |
Hardness:
|
8.0 |
Density:
|
3.53 (+/- 0.04) |
Crystal Group:
|
Orthorhombic |
Occurrence:
|
Africa, Asia, Mexico, Russia, South America, United States |
