What is the price of a amethyst?

Amethyst is a semiprecious gemstone, and is not very expensive to buy. When buying an amethyst one must look for an intense and uniform purple color with no inclusions. Even a small inclusion will reduce the price of the gem. Due to its abundant availability there is not much of a difference in medium quality gem and commercial quality. But Excellent beautiful natural untreated amethyst can command good price. A small 3 ct stone can cost up to USD 5 per carat whereas a high quality big size amethyst gem stone could cost up to 50 USD per carat.