Sapphire is a variety of Corundum. Generally recognised as Blue it can appear in other colours which are still called sapphire. Only red Corundum carries the special name of Ruby.
Sapphire has been recognised thoughout history as a stone of Spiritual Truth, Enlightenment and dedication to a spiritual path. It's a protective stone which can also channel angelic healing power. Psychically activating and strongly intuitive yet also very orderly this is a good stone to use to dedicate yourself to a goal