Tanzanite Facts

Tanzanite is a unique gemstone. Find out Tanzanite facts, specialties and features here.

Tanzanite Facts

  • Tanzanite is a form of a mineral zoisite and blue in color
  • Formed some 585 million years ago
  • Made up of calcium aluminum hydroxyl silicate
  • Discovered in 1967 and credited to Manuel de Souza, a local tailor of Indian origin
  • Found only in ONE Place in the World- Mererani Hills of Northern Tanzania, near the city of Arusha and Mount Kilimanjaro
  • Mined in area four square kilometers wide, making it a VERY RARE Gemstone
  • Has a refractive index of 1.69-1.70 and a specific gravity of 3.35
  • Hardness (resistance to scratching)- 6-7 on the Moh's Scale
  • Orthorhombic in nature, relating to its different right angle axes
  • Trichroic, meaning it gives off three different colors.
  • Valued by the depth of its color- deeper the color, more valued the tanzanite
  • Weighed and sold in carats, equivalent to 1/5 of a gram
  • Heated to 500°C to develop its blue color.
  • Unique for its multidimensional colors- radiates blue, violet and burgundy, yellow sometimes
  • Named Tanzanite after its country of origin by Tiffany's in 1968
  • Known as 'the most beautiful blue gemstone to be discovered in 2000 years.
  • Celebrated by the specialists as the 'gemstone of the 20th century.
  • Declared as the 'December BirthStone' in 2002
  • Known to have the power to activate and integrate the energies and helps in metaphysical healing
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