***Bing Code***


Published: 12/01/2018

In 1967, south-east of the town of Arusha in Tanzania, a chunk of translucent rock was found. Gemologists were fascinated by its blue-purple hue and discovered that it was not sapphire, as its finder had initially suggested. The colour was more violet and the composition of this rock was different. Famed New York jewellers, Tiffany & Co., cited it ‘the most beautiful stone discovered in over 2000 years.’ Only found in the foothills of Mount Kilimanjaro, Tanzanite displays three colours: an intens royal blue, violet and flashes of red. Despite being a relative newcomer to the jewellery market, Tanzanite is fast becoming the most popular blue gemstone in the world today. Tanzanite Information

Tanzanite is in fact the blue variety of the Zoisite gemstone. However, the hydrated calcium aluminium silicate mineral achieves a hardness of only 6.5 to 7 on the Moh’s scale, and is thus not very resistant. Therefore it should be worn with care, never be cleaned by ultrasonic method and never come into contact with acids.

Typical for Tanzanite is the appearance of several colours in one and the same stone: depending on the perspective, the stone appears blue, purple or dun yellow. Most rough crystals, however, show a disturbingly large proportion of brownish-yellow, but the cutter may cure this by carefully heating the stone in an oven to about 500 degrees C. In the course of this heating, utmost concentration is demanded, for it is essential to determine the moment when the colour turns blue. Heating is therefore a treatment which is generally accepted in the trade, however, the rough stone has to be as free of inclusions as possible, as otherwise the process will lead to fissures in the stone.

Working with Tanzanite is a task which will cause even experienced cutters to tread carefully, as the cleavage of the gemstone is very high in one direction. This exclusive stone is cut in any imaginable shape and form, from classical round cuts to imaginative designer cuts.

Tanzanite represents immaculate but unusual elegance and wearing it communicates self-confidence and individuality. It also represents the 24thwedding anniversary and is the birthstone for the month of December. Furthermore the blue and purple hues of tanzanite are associated with generosity.

Learn more… Tanzanite Information


Related Content