The Aquamarine


Chrysobéryl


Diamond


Emerald


Garnet


Opal


Peridot


Rubis


Saphir


Spinel


Tanzanite


Topaz


Tourmaline


Zircon

Tanzanite

Properties
Refractive index Hardness (out of 10) Density
1,692 – 1,706 6 3.15 - 3.38

In 1967, a new gemstone is discovered near Arusha, in Tanzania. It is transparent, and of a blue-purplish colour. These crystals have a pleochroism marked according to the three directions of crystallisation, i.e. sapphire blue, purple, and yellow-green. By heating, the purple and yellow-green streaks decrease in intensity and the colour blue is reinforced. Very few blue zoisites are currently available on the market, and this gemstone is highly appreciated by collectors.

4.54 Tanzanite HS 01-1464'
  • Dimensions: X

Purple Tanzanite
4.54 cts
Heartshape

4.18 Tanzanite CS 01-1452'
  • Dimensions: X

Purple Tanzanite
4.18 cts
Cushion Cut