Here is a $25,000 5.57Ct Tanzanite and Diamond Ring in 18k white gold. This is part of a Jewelry Store stock that will be auctioned this week. The center is a 4.77Ct Tanzanite Oval gemstone that is a gorgeous stone. This vibrant gem is surrounded with Baguette and Round Brilliant Diamonds that are G-H color and VS2-SI1 clarity. The total Tanzanite and Diamond weight is approximately 5.57Cts. This will make a wonderful gift for her this season. This 5.57Ct Tanzanite and Diamond Ring has a retail replacement cost of $25,000 and it will be auctioned with a surprisingly low reserve.