TANZANITE


All facts and figures taken from the GIA

TANZANITE

Lush blue velvet. Rich royal purple. Exotic tanzanite is found in only one place on earth, near majestic Kilimanjaro. Found in just one place on earth, tanzanite is a relatively recent discovery. This blue variety of zoisite was named for Tanzania, the country where it was found, by Tiffany & Co. Because crystals show different colors depending on viewing direction, cutters can choose bluish purple or the more favored pure blue or violetish blue hue depending on how much weight they want to retain from the rough.


MINERAL: Zoisite
CHEMISTRY: Ca2Al3(SiO4)3(OH)
COLOR: Blue to violet to bluish purple
REFRACTIVE INDEX: 1.691 to 1.700
BIREFRINGENCE: 0.008 to 0.013
SPECIFIC GRAVITY: 3.35
MOHS HARDNESS: 6 to 7


Tanzanite is a birthstone for December, along with zircon, turquoise, and blue topaz. Tanzanite is also the gem for a 24th anniversary.

FOUND WHERE

Precious_Gemstone_Where_Found_Tanzanite