Some of the rarest tanzanite we sell offers a red flash at different angles. This red flash is very sought after because it is not common in Tanzanite gemstones and jewelry. Most red flashes are found in larger Tanzanite, especially from what we have sold over the years. The collection here is all we currently have of Tanzanite with the red flash. Keep an eye on this page for any new Tanzanite gemstones with the red flash or contact us for more information.