Hematite helps you to release patterns of behavior that no longer serve you
Amethyst increases your will power and decreases your destructive behaviors
Moonstone allows you to reflect and practice introspection without fear
Citrine helps you find balance between heavy emotions and feelings of gratitude
Obsidian helps you scry your thoughts to find out what needs to be released. You can stare into its shiny coating to find images that mean something to you. This will help trigger the thoughts of what needs to be worked on.
For more information on these stones please visit the LYC Crystal Dictionary