Colour: sky-blue colour, pale bright or intense shades of blue, Swiss blue, light grey or greenish tinge.
Hardness: 8.0 (In Mohs Scale)
Nature of Solid: Orthorhombic
Refractive Index: 1.606 to 1.644
Birefringence: 0.008 to 0.011
Specific Gravity: 3.4 to 3.6
Swiss blue, which comes with a delightful distinctive blue shading, resembles a shade of the sky on a cloudless day is the most expensive blue topaz colour and its nearly the same as sky blue only slightly darker serves as a good taste for those who love light hues or breezy spaces, while electric blue is similarly desirable among other individuals.
The Blue Topaz price in India is $20 to $40 per carat (or 2833.42 INR approx.). As naturally occurring blue topaz are extremely rare, virtually all blue topaz used in jewellery is heat or irradiation treated for suiting the market demands, therefore, the price range varies around factors like the kind of treatment it is being subjected to.
Blue Topaz Stone Benefits are:
In conclusion, although all varieties of Blue Topaz not much widely branded as distinctively popular, each occupies its own standard in the classification arena having unique features & are still being marketed locally as well as globally worldwide.