1.50 Cts of 7 mm AA+ SI (Slightly Included) Round Arusha Tanzanite ( 1 pc ) Loose Gemstone The 7 mm round AA+ quality Tanzanite is medium to light blue colored gem. Tanzanite is a purple-blue colored gem found in Tanzania, it resembles the more expensive Blue Sapphire. Tanzanite is the December Birthstone. Design your own ring or a pendant; buying loose gemstones is economical and allows one to create jewelry as per choice. 30 Day No questions asked Return Policy Free-Shipping within US Loose Tanzanite / December Birthstone