Goldstone is a man-made glass that contains copper crystals, giving it a characteristic sparkling or shimmering appearance. It is typically reddish-brown or blue in color, with tiny, reflective copper inclusions that create its distinctive "glitter" effect. Goldstone is often used in jewelry, such as beads and pendants, due to its aesthetic appeal. It has a Mohs hardness of 5.5 to 6 and is generally durable enough for decorative purposes. Goldstone is primarily produced in Italy, though it is now made worldwide.