These earrings are very lightweight and add a pretty pop of color. Measures approximately 2-1/4″ L by 1/2″ W and has post backs. The Kingman Turquoise Mine is one of the oldest and highest producing Turquoise Mines in America. It was originally discovered by prehistoric Indians well over 1000 years ago. Kingman Turquoise is known for its beautiful sky blue color and produces many variations of blue Turquoise. Kingman turquoise earrings.