Tanzanite ranks between 6.5 and 7 on the Mohs hardness scale, which means it is a slightly soft gemstone, similar to emerald but less brittle. (For comparison: diamond is the hardest gemstone, scoring 10 on the Mohs scale, while sapphire and ruby score 9.)
Tanzanite also exhibits perfect cleavage, which indicates the gem’s tendency to break from a strong blow.
Due to its hardness and properties, tanzanite needs to be treated with care – but this doesn’t mean that tanzanite stones are not suitable for jewelry. With a few simple precautions, you can preserve and enjoy tanzanite’s beauty for many years to come. It is ideally suited for dress rings, earrings and necklaces.
If you’re an active person, consider jewelry that won’t be exposed to as many bumps: such as pendants or earrings. Tanzanite is also increasingly used in engagement rings – just make sure the setting design used in the piece protects the gemstone and reduces the probability of damage.