According to a well-known industry magazine, Colored Stone, blue topaz has become the 2nd most popular colored gemstone (sapphire is consistently number one). 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. Blue gemstones with good hardness and brilliance tend to be rare and fairly expensive. This is especially true of the darker blue gems, such as sapphire, tanzanite and spinel.There are other, less expensive gems in a saturated deep blue, including. Kyanite, lapis lazuli, iolite and fluorite. But these are much softer stones that are not suitable for everyday jewelry such as rings. Blue topaz is unusual in offering excellent hardness (8 on the Mohs scale) and brilliance. The item "ESTATE VINTAGE 14K YELLOW GOLD BLUE TOPAZ PENDANT ENHANCER DESIGNER SIGNED" is in sale since Thursday, February 14, 2019. This item is in the category "Jewelry & Watches\Fine Jewelry\Fine Necklaces & Pendants\Gemstone". The seller is "4744366" and is located in Andover, Massachusetts. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica.