The image is a representation of the mineral available in the skulls. Each skull is unique and will exhibit a variation in colour, tone and pattern. Each one is beautuful in its own right and may look different to the image in the photograph.AmethystAmethyst is a form of quartz which has traces of manganese and lithium within its matrix. This stone has been used for thousands of years to promote calmness and relaxation.Amethyst is known to promote healing and to increase intuition. Amethyst is an excellent to use in the development of the third eye.