One copper electroformed Turquoise Bull Skull on an 18" soldered copper chain. Turquoise has been used in religion, art, jewelry, trade and treaty negotiations for hundreds of years. Turquoise is one of the official birthstones for the month of December, and is heralded as the "Stone of Communication". It is said to encourage enthusiasm, thus inspiring new projects and bringing to light undiscovered artistic abilities. Shamans strongly believed that the bull skull holds the spirits’ secret knowledge; therefore, it was used in all their sacred rituals. Bull skulls measure approximately 1.5" x 1.0". Size, shape, and color may vary as no two stones are alike.