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

Kornerupine

Per carat price: $64.53 to $121.57
Kornerupine is also called prismatine and it is a borosilicate mineral that is commonly found in yellow to brown shades. But the most expensive kornerupine gems are those that come in emerald green and bluish green.

This is a 1.3-carat bluish-green kornerupine is found in Tanzania. The fact that it displays different hues from different angles makes it more valuable. This particular stone is rare and is valued at $1,599.99.