The Most Valuable and Expensive Gemstones In The World – Some May Surprise You

Axinite

Per carat price: $59 to $540
Axinite is a rare borosilicate mineral. It comes in gray, brown, and purple. This gemstone is used in jewelry since it is very resistant to scratches. However, they are not as hard as diamonds.

Axinites are rarely clear but they are considered to be valuable because they are hard to find. The most expensive axinite is this purple stone from Tanzania. THidennitehe gemstone is valued at $450.