Since the early 2000s, blue topaz has become the second most popular gemstone in the world (sapphire is consistently number one). Topaz popularity is certainly not surprising. Topaz is a very hard material - 8 on the Mohs hardness scale - and blue topaz is a very pretty stone that is available in a wide range of vivid hues with a striking vitreous luster. It is also a very affordable gem when compared to the price per carat of similar colored gemstones such as aquamarine.
Blue Topaz colors
The most popular color of topaz is blue, anything from pale blue to deep blue. As blue topaz is extremely rare in nature, nearly all blue topaz is the result of first irradiation and then heat treatment. The favorite blue variations are the bright light colored 'Sky Blue', medium colored 'Swiss Blue' and the much darker 'London Blue'.
Sky Blue Topaz
The bright light-blue variety of Topaz is known as sky blue Topaz. The sky blue topaz resembles the color of the sky and varies in shades. Its pleasing light blue color gives you the look of Aquamarine but at a very affordable price.
Swiss Blue Topaz
Swiss blue topaz is one of the more popular of topaz colors, and it lies somewhere between that of light sky blue and deep London blue. Although it may be the middle of the road when it comes to Swiss blue color, the gemstone itself is far from mediocre. Swiss blue topaz has a beautiful vivid blue color and is considered one of the most desirable colors on earth. The hue of Swiss blue is often compared to the azure of sky blue and the vivid blue of clear ocean water.
London Blue Topaz
London blue is the deepest of blue topaz colors and is described as being a medium to dark grayish-blue, sometimes referred to as 'inky' blue. London blue topaz gems will often have a slight secondary greenish tone when viewed from certain angles. Of all the many different colors of blue topaz, London blue is the most prized and usually the most valuable.
How much does Blue Topaz cost?
Sky blue topaz is the least expensive with gemstones costing around $5 - $10 per carat. Swiss Blue gemstones under 5 carats in weight will be around $6 - $20 per carat while genuine London Blue can be a little more expensive at $7 - $30 per carat. Blue topaz larger than 5 carats can be more expensive per carat but still very reasonable. A blue cabochon on the other hand can be much cheaper since the clarity is not that important for this cutting style, it can have some inclusions. We offer free gemstone brief reports for each gemstone we sell.
Where is Blue Topaz found?
Blue Topaz can be found all over the world, but the most productive and lucrative areas are in Brazil.
Is Blue Topaz Treated?
While blue topaz does exist in nature the vast majority of the popular Blue Topaz sold around the world has been 'treated' in one way or another. To get the classic Sky Blue, Swiss Blue or London Blue, the untreated usually colorless gemstone is first exposed to radiation and then heated.
What jewelry is Blue Topaz suitable for?
Blue Topaz is a beautiful gemstone which, because of its durability, is an ideal gem for any type of daily wear jewelry. This hardness, as well as its availability in large crystals, makes it perfect for an array of fancy cuts including concave cuts where the shaping of the gemstone results in a lot of wastage.
Is Blue Topaz a birthstone?
Blue Topaz is one of the three birthstones for December, the others being Turquoise and Tanzanite.
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