Q: What are the properties of tanzanite gemstone ?
A: Tanzanite gemstone has a variety of properties that make it highly desirable. It has a hardness of 6.5 to 7 on the Mohs scale, making it suitable for jewelry. The stone also has good clarity and a vitreous to sub-adamantine luster when polished. Tanzanite's most distinctive feature is its exceptional color, which can range from intense blue to violet-blue.