The value of an aquamarine depends on its color, clarity, cut, size and treatment. The most valuable aquamarine is strong, intense blue, very clear, perfectly cut, untreated and over 10 carats. Aquamarine gemstones of this quality will cost many thousands of dollars.
The least valuable aquamarine has a very pale color, inclusions (internal flaws or cracks), disproportional uneven cut, and is less than 1 carat in size. Gemstones of this quality range from $40 to $200.