AALTO Gold Aquamarine Pear Signet RingA beautiful 13. 18ct pear shaped Zimbaqua Aquamarine has been lovingly hand set into a 9ct setting to create this showstopping design. Zimbaqua is the world's first sustainable mine, empowering women in rural communities through mining. The mine is working hard to ensure that communities, education, and children's well being are prioritised through communication with community leaders. The Aalto ring, named after the Finnish word for "wave,"