Blue goldstone is manmade glass coloured blue by cobalt with silvery flecks suspended in it. The invention of the original goldstone occurred by accident in seventeenth-century Venice by the Miotti family using copper rather than cobalt. The glass is made in a reducing furnace with cobalt added, it then crystallizes. As a healing stone, it is the stone of learning and communication and has a gently uplifting quality. The metaphysical properties of cobalt are said to cloak and transform a traveler. It is a powerful, radiant and psychically active element.