Aquamarine, the blue to green species of beryl, has been used in ornamental jewelry for thousands of years. The traces of iron found in the gem caused the seawater like color that varies in intensity from dark blue, medium blue green to pale sky blue that is almost colorless. During the middle Ages, aquamarine was believed to be an antidote for poison and it was once a popular adornment for European monarchy. Additionally, aquamarine renders some medicinal powers and was thought to cure throat, liver, mouth and stomach illnesses.
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