Education Centre

Education Centre


The first thing you notice is the color: Deep, vivid blue, with a purplish tinge that dances about the stone as it moves in the light

With its dazzling intensity and complex play of color, Tanzanite boasts a uniquely sensuous appeal.

Tanzanite’s dramatic discovery, coupled with its scintillating beauty, caused a worldwide sensation. To date, the world’s only source for the gem remains the hills of northern Tanzania, near Mount Kilimanjaro. They are heat treated to produce colours that include light to dark violetish blue and blueish purple, as well as pure blue.

General Info

Major Sources

Tanzania (only source)


Environmental Factor


 HeatSudden temperature change can cause cracking
 ChemicalsAttacked by hydrochloric acid and hydroflouric acid


  • A - Eye clean; medium light to medium, grayish purple, grape colour; good cut
  • AA - Eye clean; medium to dark grayish purple, grape colour; good cut
  • AAA - Eye clean; very dark to avoid grayish purple, grape colour; good cut



6-7 on the Mohs Scale


Fair to poor, due to cleavage and sensitivity to thermal shock.


Tanzanite is not for everyday wear, and one should take care when wearing. Avoid exposure to heat and sudden changes in temperature. Avoid contact with chemicals.

To clean, gently scrub with a soft toothbrush and a solution of mild dish soap and warm water.

Further care instructions