stone size : 10 mm materials : blue sapphire stone, fine silk cord, 925 sterling silver clasp length : 45 cm Known as the "wisdom stone", each colour of Sapphire brings its own particular wisdom. It releases mental tension, depression, unwanted thoughts and spiritual confusion. Sapphire restores balance within the body, aligning the physical, mental and spiritual planes, bringing serenity and peace of mind. It stimulates concentration, brings lightness, and joy. Sapphire is also known as a "stone of prosperity", attracting gifts of all kinds and fulfilling dreams and desires.