Topaz color type

The gem-quality topaz on the trade is divided into the following varieties by color:

(1) Shirley Topaz: The most important variety in topaz is named after the color of sherry, the light yellow or dark brown wine of Spain. It includes natural and processed different shades of topaz with yellow and brown main tones, and even orange and orange with brown components. The most expensive of these is orange-yellow topaz, called "Emperor Topaz", which is also in the category of light orange yellow and golden yellow. The rare "velvety" shades of soft brown to yellowish brown and orange, orange-red topaz are also popular.

(2) Blue Topaz: It includes blue varieties with different shades and light shades. Commercially, the color blue topaz is divided into "sky blue" (bright blue), "London blue" (bright blue) and "Swiss blue" (light blue). The color topaz (topaz) is still recognized as a natural gemstone in jewelry appraisal because it has not added any other substances during the treatment. The natural blue topaz shades vary from place to place.

(3) Pink topaz: refers to powder, light red to light purple or violet topaz. It is mainly made of yellow and brown topaz irradiated and heat treated. The darker natural pink topaz is the most popular, but the amount is very small, but also processed by colorless topaz, but with a brown tone. The stable red component is always associated with chromium and has its characteristic absorption line.

(4) Colorless Topaz: Used in the past as a diamond substitute, it was once called "slave diamond." Now it is a color stone material, rarely used as a piece.

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