Yeyo Discovery


Tanzanite is the blue/purple variety of the mineral zoisite (a calcium aluminium hydroxyl sorosilicate) belonging to the epidotic group. It was first discovered in Mererani Hills, Northern Tanzania in the year 1967, near the city of Arusha and Mount Kilimanjaro.

Millions of years ago, metamorphous slates, gneiss stone and quartzite have shaped impressive flat insular mountains on the wide plains near Mount Kilimanjaro. In the core of these unusual rises the valuable crystals are stored. For a long time they have remained hidden, until one day some Masai herdsmen passing by noticed crystals sparkling in the sun and picked them up.

Tanzanite is used as a gemstone, and naturally-formed tanzanite is extremely rare ( a gem rare 1000 times than diamond), still found only in the Mererani Hills and the current deposit thought it will only last for one generation.

Tanzanite is noted for its remarkably strong trichroism, appearing alternately sapphire blue, violet and burgundy depending on crystal orientation. The deep blue of Tanzanite is magnificent, ranging from ultramarine to a light purplish blue. The most coveted color is a blue which shows a purplish hue shimmering around it, which is extremely spectacular in sizes above ten carats.

Tanzania is the world’s only source of tanzanite, a semi-precious stone found in the open mines around Arusha. The stone comes in three grades, ‘A’, ‘AA’, and ‘AAA’. ‘AAA’ is the highest quality.

The mineral was named by Tiffany & Co. after Tanzania, the country in which it was discovered. In 2002, the American Gem Trade Association chose Tanzanite as a December birthstone, the first change to their birthstone list since 1912. Tiffany’s original campaign advertised that tanzanite could now be found in two places “in Tanzania and at Tiffany’s”.  Yeyo will help you source ethical mined Tanzanite on ground and help with the export procedures where necessary

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