0.18-0.25 Cts of 4 mm AAA Heart Aquamarine ( 1 pc ) Loose Gemstone The heart-shaped Aquamarine is the fine AAA quality nice blue colored gem measuring 4x4 mm. Aquamarine is a blue beryl available in a range of pale blue to beautiful aqua blue, deep sky blue stones are most valuable. Natural Aquamarines are usually pale or very light blue therefore they are treated to enhance the color. 30 Day No questions asked Return Policy Free-Shipping within US Loose Aquamarine / March Birthstone