I am offering a top color, nearly eye-clean specimen, high-grade cabochon, or semi-facet grade, Vietnamese Aquamarine crystal weighing 18.6 carats (3.72 grams). It measures 34.5 X 7.5 X 6.5 mm. Some of the darkest Aquamarines in the world come from Quy Chau District, Nghe An Province, Vietnam. Known in the jewelry industry as “Santa Maria” blue. Stones of this color, well cut and eye-flawless can fetch up to $1000 per carat in stones of 5 carats and above. This excellent specimen was hand-picked for me by the miner in Viet Nam for color and clarity. If cut, it should cut a top-color cabochon of 12 to 15 carats. I would also facet one or two beautiful, very lightly included gems, or it can be kept as a beautiful specimen.