A splendid clear stone. It is mainly blue, but parts of the stone will also look violet.
Treatments before purchase
Almost all tanzanite is heat-treated, when first mined
it's a muddy brown colour. The treatment is permanent.
Only a few pieces need no treatment, these are even more attractive if you are ever lucky enough to see one (I never have).
Inclusions and fractures are rare, so fracture filling is very unlikely. However we have seen reports that some colour enhanced stones are appearing. As yet there is insufficient information to give any further guidance.
It's not a treatment, but you must be aware that some stores are selling tanzanite coloured CZ, so read descriptions carefully. If the stone's name is not spelt exactly as shown here, it's almost certain to be a trademark for blue CZ.
Caring for Tanzanite
The stones are comparatively soft, and will be scratched
by household dust. Do not wear when doing manual work (including
They can be soaked in lukewarm water to clean them, but should not be soaked in Silver Dip.
Treat with care, and enjoy these beautiful stones for many years. They look splendid, especially when seen with diamonds, and are ideal for special occasions.