Tanzanite first found in 1967 in an area of northern Tanzania in eastern Africa. In 1968, Tiffany & Co. stepped in to promote this stone and gave it a name as “Tanzanite”. The company began using large, fine-quality tanzanites as affordable and more abailable alternatives to the best blue sapphire.
Most-prized colour is a pure blue similar to fine sapphire’s or an intense violet-blue all its own.
Most tanzanite is heat-treated (600-650°C) to turn it from a browish hue to a more marketable blue.
Learn more: https://www.gia.edu/tanzanite
Photo courtesy: J-ART, Shop 101, Melbourne Plaza, 33 Queen's Road Central, Hong Kong.
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