Natural Aqua Blue Aquamarine Micro Faceted Roundel Beads Strand Length 14 Inches and Size 4mm Approx.These are 100% genuine aquamarine beads. Aquamarine is blue color variety of Beryl Gemstone species. It usually shows the inclusions visible as the rain effect inside of gemstone. The presence of Fe (iron) in Beryls chemical composition gives it the blue color hence resulting in Blue beryl known as aquamarine.