While topaz normally ranges from clear to golden yellow to brownish yellow in color, the gem also has a green variety. The ...

Kornerupine is considered to be a gemstone when it's found in its clear green and yellow shades. Bluish-green kornerupine stones are worth the most, but emerald green stones are valuable as well.

Known for its deep red hue, rubies are highly prized and valued at around $4,625 per carat. One of the hardest and most sought-after gemstones, diamonds cost approximately $9,502.13 per carat. A light ...