Onyx earrings! This protection stone is great for guarding against negative energy. Onyx is known to literally banish toxic people and relationships from the wearer's life. It's association to Saturn makes it a great stone for Capricorns. Leo's are also known to enjoy the energy around this stone due to its ability to balance the Solar Plexus Chakra.
Disclaimer: Crystal healing is not a substitute for medical advice and treatment. It may be used as a supplement. If you choose to use crystal healing on yourself or others, you do so at your own risk.