Blue Topaz is a kind of topaz that’s one of the most liked and most valuable topazes. Colorless topaz stones are illuminated and heat-treated to display a series of blue hues, from pale sky blue to swiss blue and ashy blue. Blue topaz is an aluminum silicate that approximately has 21% fluorine or water.
Blue has become the most popular color for topazes on the market today. Blue topaz can range from a very light blue to a deeper blue color. It can also have a slightly turquoise hue, reminiscent of aquamarine. Naturally occurring blue topaz is extremely rare. Due to its rarity in nature, blue topaz in most, commonly, obtained by heating and irradiation of colorless gray, or pale-yellow topaz. This is not considered to alter the gem’s durability. It registers 8 on the Mohs scale of hardness, making it almost as hard as sapphire and tougher than tanzanite.
Blue topaz is mined in many parts of the globe, including Brazil, Sri Lanka, Madagascar, Myanmar, Pakistan, Russia, Nigeria, China, Australia, Japan, Mexico, South Africa, Scotland, Tasmania, Ireland, and the U.S.
Sky Blue Topaz is the traditional birthstone for December and 4th and 19th wedding anniversaries.