A March birthstone necklace is the accessory you never knew you needed. Simply put, this gemstone doesn't just have a beautiful meaning, it also looks beautiful. Known for its art deco feel, particularly when surrounded by a halo of diamonds, aquamarine gives a feeling of light and energy. A March birthstone necklace fits right into the pastels of spring, looks perfect with the white ice of winter, and is a natural with the bright blues of summer.