This crystal is Amethyst. Amethyst is the stone of spiritual protection and purification. It is said to create a "Shield of Spiritual Light" around the body. Carry this crystal to protect from low energies, stress and unhealthy environments. Keep an Amethyst Cluster on your nightstand, desk or bookshelf to always feel protected in your space.
These Amethyst Clusters are about 2-1/4" long and 1-3/4" wide for the medium size and about 1-3/4" long and 1-1/2" wide for the small size. The extra small size is about 1-3/4" long and 1-1/4" wide.