Intentions: Inner strength, focused attention, willpower, self-mastery, discipline, reason
Chakras: Root (1st), Solar Plexus (3rd), Third Eye (6th)
Onyx is a well-known stone for protection, using your will and strength to protect yourself. It helps with all types of strength, physical, spiritual, and emotional, and keeps you going with the going gets tough, or even just tiring. When you use it with other stones, it doesn't enhance them but focuses their intentions to push through.