The name tanzanite (after the East African country Tanzania) was introduced by the New York jewellers Tiffany & Co. In good quality the colour is ultramarine to sapphire blue and in artificial light it can appear more amethyst violet. It is the only gemstone known to be trichroic, meaning it displays 3 colours at the same time; blue, purple and red. It is graded as 6-7 on the Mohs scale of hardness meaning it is susceptible to chips and scratches. The cut of tanzanite affects its brilliance and colour display. It is often cut in cushion, oval, and emerald shapes to enhance its colour and trichroism.
Where are tanzanites found?
Tanzanite was discovered in 1967 by Manuel de Souza, a prospector, in the Mererani Hills near Mount Kilimanjaro in Tanzania. It was initially thought to be a sapphire before being identified as a new type of gemstone. As tanzanite is found only in a small area it makes it one of the most geographically restricted gemstones. The mining area covers only about 4 square kilometers. It is estimated that these deposits maybe depleted within the next few decades.
Are tanzanites natural?
Most tanzanite on the market is heat-treated to enhance its blue-violet colour and remove brownish hues. This heat treatment for tanzanite is stable and widely accepted in the gemstone market. Untreated tanzanites are rare and often exhibit less intense colour. They can be more valuable due to their natural state.
Is tanzanite jewellery expensive?
It is a gemstone that is considered to be semi precious therefore is often cheaper than other precious gemstones. However it can be expensive, especially for high-quality stones with excellent colour and clarity but there are options available at various price points. Its unique and captivating colour, rarity, and limited geographical source make tanzanite a valuable and desirable gemstone for jewellery.
Why choose tanzanite jewellery?
Choosing tanzanite jewellery allows you to own a piece of natural beauty that is not only rare and valuable but also rich in colour. Whether for personal enjoyment or as a meaningful gift, tanzanite's unique qualities make it a compelling choice for any gemstone enthusiast or jewellery connoisseur.
