Hand-cut cabochon, Royston natural ribbon turquoise Origin: Nevada, USA Shape: oval Color: blue Dimensions: 24 x 11 x 7 mm Weight: 17ct Natural stone (not stabilized). Boulder / ribbon turquoise. Backed for stability and durability. Handmade in Albuquerque, New Mexico. Recommended for use in bezel settings. Protect from heat and harsh chemicals. Do not leave immersed in water for long periods.