Tanzanite Gemstone Guide

Tanzanite Gemstone

Tanzanite gemstone

Tanzanite comes from the mineral zoisite which was discovered in the foothills of Mount Kilimanjaro and therefore earns its name from the east African state of Tanzania. Being discovered in the 1960s it is celebrated as the gemstone of the 20th century. It's recognisable by its striking blue or violet colour. It is a gemstone used purely for jewellery as it has quite a soft quality, ideal for delicate jewellery such as earrings and necklaces but less suitable for industrial uses. It is considered a geological phenomenon as it is found in one location worldwide and as a result is a very rare and often expensive gemstone. Both Turquoise and Tanzanite are considered birthstones for December so if you are looking for a premium gift for a birthday falling in December you may want to choose from our tanzanite jewellery collection.

Tanzanite colour

The Tanzanite Foundation, a non-profit, industry supported organisation that is dedicated to protecting and promoting tanzanite, has introduced its own colour grading system which divides the hues between blue violet and violet blue. The most valuable colour of Tanzanite is violet blue also known as triple A. To bring out its violet blue hue, tanzanite needs to be treated at 600°C in a gemological oven. Gemstone colour is measured in primary and secondary hues. For tanzanite these are blue and purple. Purple lies between blue and red in the spectrum, but once treated with heat the hues range from blue violet or purple to violet blue.

Clarity also plays a large part in the value of tanzanite. The gemstone is more valuable if it is bigger and the clarity is flawless to the naked eye.

Caring for tanzanite

Tanzanite is a delicate gemstone, sudden temperature changes may cause the stone to crack. When storing tanzanite jewellery be sure to keep it in a loose cloth or pouch in a cool place and away from other jewellery that could easily scratch it. Tanzanite jewellery should only be washed in warm mild soapy water.

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