Here is a $4,000 1.85Ct Loose Tanzanite Trilliant Gem. This is part of a jewelry store stock that will be auctioned this week. This Tanzanite has a deep bluish purple color and it has some slight natural imperfections that can be seen to the naked eye. This gem will look great in the center of a pendant or a ring. Tanzanite is the December birthstone. This 1.85Ct Tanzanite has a retail replacement cost of $4,000 and it will be auctioned to the highest bidder at $1 No Reserve.