Aquamarine, first used to describe the color in the late 15th century, is instantly recognizable: set into neutral sterling silver jewelry, Aquamarine’s delicate yet mesmerizing hues are intensified Silvershake's Celtic knot jewelry in sterling silver have ancient patterns over 5000 years old Silvershake 7X5mm Genuine Octagon Shape Aquamarine 925 Sterling Silver Celtic Knot Solitaire Ring, is shipped with anti-tarnish protection in reinforced gift boxes & satin-style pouches; guarantee far-outlasting competitors March is embodied by birthstone Aquamarine; dazzling blue-green warmth with spring colors to come Silvershake 7X5mm Genuine Octagon Shape Aquamarine 925 Sterling Silver Celtic Knot Solitaire Ring Size 9.5