Here is a $12,000 3.57Ct Tanzanite Loose Gemstone. This is part of a jewelry store stock that will be auctioned this week. If you have always wanted a Tanzanite- this gem is Gorgeous. It has a purplish blue color and a vibrant sparkle with clean purity. This Tanzanite will look awesome in a custom ring or necklace. If you collect gems or love to design your own jewelry- you won't want to miss this auction. Tanzanite is the December birthstone. This 3.57Ct Tanzanite has a retail replacement cost of $12,000 and it will be auctioned to the highest bidder at $1 No Reserve.