This is a beautiful Amethyst cluster with well-formed white Calcite crystals growing in it.  The Amethyst is a lovely soft color with super clear points.  You can see into each one of them.  The white Calcite crystals are well terminated and in excellent condition.  You can see in picture 9 how some of the Calcite crystals have grown in a circle completely enclosing one of the Amethyst points.  Metaphysically, these two minerals work very well together.  Amethyst stimulates the Third Eye Chakra and enhance our intuition, and Calcite aids us in initiating change in our lives by nurturing new beliefs and ideas from our higher selves.  Its as if the Amethyst opens us up and the Calcite lovingly creates a safe environment for our spiritual growth.