Ca2Al2(AlOH)(SiO4)3 - Hydrous Calcium Aluminium Silicate
A velvety blue variety of the mineral zoisite that was found for the first time in 1967 and named after the country of its birth by Tiffany & Co in New York, who introduced the gemstone to the world market in 1969.
It's unique blue color is fabulous. Tanzanite may be blue, purple or slate gray. More on...
Care and Treatment
Tanzanite is often heat treated to improve its color and clarity.
Tanzanite can easily be scratched or chipped. Clean your Tanzanite with warm, soapy water and a soft bristle brush. Avoid using ultrasonic cleaning.
Star Stone Months
Tiffany & Co. of New York named this gemstone and introduced it to the world in 1969. It is one of the newest, most fascinating gemstones on the market today.
A very large tanzanite (122.7 carats) may be seen at the Natural History Museum in Washington DC.