• Mineral: Zoisite
  • Chemistry: Ca2Al3(SiO4)3(OH)
  • Color: Blue to violet to bluish purple
  • Refractive Index: 1.691 to 1.700
  • Birefringence: 0.008 to 0.013
  • Specific Gravity: 3.35
  • Mohs Hardness: 6 to 7

About Tanzanite

Tanzanite is the violet to violet blue variety of the mineral zoisite. To this present day tanzanite can only be found in Tanzania, Africa.

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Product Description


Tanzanite is a relatively new gemstone. It was first discovered in 1967 in Tanzania close to Mount Kilimanjaro by Masai tribesman Ali Juuyawatu. Since then tanzanite has become one of the most prized gemstones today. The name tanzanite was coined by jewellery company Tiffany & Co, naming it after the originating country Tanzania.


To this present day Tanzanite can only be found in the Mererani Hills, Tanzania.


Top quality tanzanite could rival blue sapphires in its colour and saturation. Violetish blue tanzanites are much sought after by consumers because of the rarity and beauty of this gemstone.


There is a possibility that tanzanites mines in Tanzania may be exhausted in the next 20 years.