Unlike its shape, Lava stone has been used for healing purposes for centuries. Lava is a rock formed from magma erupted from a volcano. It comes from the core of the earth, so it is the source of energy. It is wonderful for calming the emotions. Onyx crystals suppresses toxic emotions and helps you to get rid of negative perceptions such as sorrow and depression. It improves your self confidence. It is a protective stone worn when facing enemies in battles or difficult situations which gives you strong support. Onyx is so effective in improving the condition of kidneys, eyes, and hair and it is useful for bone marrow diseases. It helps you lose weight! Onyx is December’s mystical birthstone and Leo’s zodiac’s.