|Topaz is a hard, brilliant, transparent stone with a wide range of color options. The "pure" topaz color is yellow and was often confused with chrysolite, the yellow variety of peridot. However, the use of distinct colors has helped topaz come into its own.
There are two variations of this mineral group - precious and imperial. Blue topaz is an example of a precious topaz. Imperial topaz is more rare and consequently more valuable.
Blue topaz in particular is popular in jewelry today. It has a watery blue color similar to aquamarine but often without the green overtones, and its hardness and good clarity make it an excellent gem. The blue color is often enhanced through heat-treatment and irradiation.
Blue topaz is the birthstone for December.
||Naturally pale to medium sky blue, but can appear vibrant blue if irradiated
||Mohs' hardness rating of 8. Topaz is the birthstone for the month of December.
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