description Blue Topaz Overview
Blue topaz is the blue variety of topaz, a fluorine- and aluminum-bearing silicate mineral used as a gemstone. Most blue topaz sold commercially is made by irradiating colorless topaz and then applying heat treatment, while naturally blue material is uncommon. It is used in jewelry and is recognized as the state gem of Texas; topaz is also the birthstone traditionally associated with November.
help Blue Topaz FAQ
Is most blue topaz naturally blue?
No. Most commercial blue topaz begins as colorless topaz and is treated with irradiation followed by heat treatment. Naturally blue topaz is uncommon.
What are the common names for treated blue topaz colors?
Treated blue topaz is commonly sold in shades described as Sky Blue, Swiss Blue, or London Blue. These names generally refer to different color depths rather than separate minerals.
What mineral is blue topaz made from?
Blue topaz is the blue variety of topaz, a fluorine- and aluminum-bearing silicate mineral. Its blue color may come from treatment rather than natural formation.
Is blue topaz suitable for jewelry?
Yes. Topaz has a Mohs hardness of 8, so blue topaz is suitable for rings, pendants, and earrings, although it can still fracture if struck because of its cleavage.
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