aquamarine ăk˝wəmərēn´, äk˝– [key] [Lat.,=seawater], transparent beryl with a blue or bluish-green color. Sources of the gems include Brazil, Siberia, the Union of Myanmar, Madagascar, and parts of the United States. Oriental aquamarine is a transparent crystalline corundum with a bluish tinge. The emerald is similar in composition, differing only in color.
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