This is a very nice genuine untreated violet blue tanzanite (Zoisite) pendant in sterling silver from Merelani.
Because of its growing popularity, Tanzanite was designated as a modern birthstone for the month of December in 2002. Tanzanite is also the gem for a 24th anniversary.
Location: Merelani Hills, Umba Valley, Lelatema Mts., Arusha Region, Tanzania
Size: 2.8 x 1.1 x 0.7 Centimeters with bail
Weight: 3.37 grams Combined

Interesting Fact: Tanzanite is the Tiffany & Co. trade name for blue zoisite, named after the country of origin, Tanzania. Tiffany could have sold the material under the mineralogical name of "blue zoisite," but they thought the name "tanzanite" would stimulate customer interest and be easier to market.
Tanzanite has only one source: the hills of Merelani in northern Tanzania.