Tanzanite was unknown till 1967. It was discovered on the slopes of Kilimanjaro at the foot of the Merelani Hills in Tanzania, the only place in the world to mine Tanzanite.

Tanzanite is the name of the blue variety of the mineral Zoisite and it is believed to be 600 million years old. Tanzanite can show a dominance of intensity of either Blue or Violet or a combination thereof. When colour grading the dominant colour (HUE) of the stone will be mentioned last e.g. Blue-Violet (Violet being the dominant colour) and Violet-Blue (Blue being the dominant colour).

There are five categories of saturation (the strength of the hue). Vivid being the darkest colour on the grading scale and pale being the lightest.

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