Blue to purple, with shades of violet in between.
Has only one known source, the hills of Merelani in northern Tanzania. Initially believed to be a sapphire.
Use in jewelry:
Can be cut and faceted in a variety of shapes, making tanzanite a versatile gemstone for use in jewelry.
6-7 (1 softest to 10 hardest)
Most tanzanite is heated to improve color. All treatments must be disclosed.
Mild soap and warm water, dry with soft cloth. Never use ultrasonic or steam cleaners.