A woman in a violet satin dress on a terrace above the sea, looking out past the camera, wearing a marquise-shaped tanzanite cluster earring and a tanzanite line bracelet on the hand resting at her shoulder.
MAISON TANZANITE

THE JOURNAL

What we have found out about tanzanite, with the sources attached: how it is found, judged, cut, worn and cared for.

The Stone 11 min

Can a tanzanite's origin be proven?

Yes, trivially, and it tells you nothing. Every tanzanite is from Merelani, so origin distinguishes no two stones. Traceability is the harder question.

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The Stone 10 min

Is all tanzanite heat treated?

Effectively all of it, and it was probably brown in the ground. What the heating does, and why unheated is a premium worth declining.

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Collecting 12 min

My tanzanite is damaged. What can be repaired?

Abrasion polishes out. A chip usually means recutting and losing weight. A clean split along the cleavage plane generally means the stone is finished.

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