Prices of Tanzanite change quickly and dramatically, due to instability between demand and supply. However, Tanzanite is a potentially excellent investment, with the round, princess and trilliant cuts are often at the higher end of the price range. Generally the larger a stone, the higher the cost per carat for the same color, clarity, and cut. Various factors that determine value and price of a tanzanite are cut, clarity, carat weight and recent news related to supply. However, it is the color that is the foremost factor in determining the price of tanzanite. It is also the finite supply, that determines the price of tanzanite, as the demand for the same arises all over the world.