Pair of hand-cut cabochons, Royston natural ribbon turquoise Origin: Nevada, USA Shape: triangle Color: blue Dimensions: 15 x 14 x 6 mm Weight: 20ct total 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.