These Amethyst cathedrals consist of three layers.The outer layer is made up of smooth Basalt, the middle layer is made up of Calcite, and the very middle hollow layer is made up of primarily Amethyist crystals. These are formed when a gas cavity (known as a Vesicle) forms in lava and becomes filled with minerals.
Amethyst has been said to help people still their mind for reaching a spiritual connection for meditation. When you are able to maintain being calm internally, it then becomes easier to eliminate self-doubt, and welcomes peace and clarity into your life.
Measurements are approximately: 9 inches tall & 5 inches in width.