opal:
Properties : Believed to be an emotionally supportive stone, helping to stabilize mood swings. While the more fiery-looking opals increase vitality, passion and zest for life.
Healing effects : Wear this stone to ease effort of handling change in life and to bring a sense of ease during times of frustration.
Personal uses : Wear this stone to help enhance memory.
Color : White, blue, pink, red, black, orange, yellow and purple
Mohs hardness : 5.5 - 6
Birthstone for : October