Skip to main content Skip to navigation Skip to site search

Tanzanite

Color:

Blue to purple, with shades of violet in between.

Gem family:

Zoisite

Birthstone:

December

History:

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.

Mohs hardness:

6-7 (1 softest to 10 hardest)

Common treatments:

Most tanzanite is heated to improve color. All treatments must be disclosed.

Care:

Mild soap and warm water, dry with soft cloth. Never use ultrasonic or steam cleaners.

Was this article helpful?

Share the wisdom

Email this Article

* Required Fields


More on this topic