Blue topaz is one of the most popular colored gemstones on the market today. It’s no wonder—this stone combines beauty, durability, and affordability in one desirable package. If you’re interested in purchasing blue topaz, what should you be looking for?
The first thing to know is that topaz is an abundant mineral in nature, but most natural topaz is colorless (or nearly so). To produce a range of blue shades, topaz is generally treated with heat and/or radiation. This is a standard industry practice, and is considered permanent, though you should avoid exposing treated stones to extreme heat. Naturally occurring blue topaz is quite rare, and should you find one for sale, expect the price to reflect its scarcity.
Blue topaz has a Mohs scale hardness of 8, which makes it resistant to scratching and thus suitable for all kinds of jewelry. However, like diamond, topaz exhibits perfect cleavage, so the mineral can be prone to chipping. You may want to consider a bezel setting for blue topaz pieces that would see hard wear, such as rings worn on a daily basis, to avoid damage. It has a high refractive index, which gives it a brilliant sparkle.
Blue topaz stones should be evaluated on the basis of their clarity, color, cut, and carats. Stones should be transparent and free of any visible inclusions, which would reduce the value of the stone significantly. Blue topaz is available in a range of hues, so judging the color is somewhat subjective, although as a rule darker, more saturated colors tend to be more valuable. If you are purchasing a necklace, earrings, or bracelet, you’ll want to be sure that the color of all the stones is well matched.
Blue topaz is available in a full range of standard cuts. Oval, pear, and emerald cuts are all popular, as they tend to take advantage of topaz’s natural crystal shape and to maximize the depth of color. Whatever the cut, it should enhance both the hue and the light-reflecting properties of the stone. You should never purchase a blue topaz that looks dull.
In smaller sizes, blue topaz is fairly inexpensive, but the price rises as the size of the stone increases. However, relative to other blue gemstones such as sapphire and aquamarine, blue topaz is still reasonably affordable in larger sizes.
Auction King regularly features blue topaz pendants, rings, and more in our auction. Feel free to browse our selection and ask us anything you’d like to know about any of the pieces on offer—we pride ourselves not only on our convenient-to-use bidding platform and great deals, but also on our commitment to friendly, responsive customer service. Register for a free online account to start bidding today!