Black onyx is widely recognized as a powerful protective stone. It absorbs and transforms negative energy. Its deep black color symbolises strength, perseverance and the ability to overcome challenges. It brings emotional and physical strength to the user. In ancient times, black onyx was often worn as a talisman to ward off evil and protect against anything that might drain your personal energy.
Gray Labradorite is also believed to have protective qualities and is used to protect against negativity. It is also said to increase intuition and psychic abilities. It is also believed to have a number of healing properties in the areas of spiritual, emotional, mental and physical well-being. It is believed to help dispel fears and insecurities, while strengthening self-confidence and faith  in the universe. It calms an overactive mind and energizes the imagination, bringing  new ideas. It is an excellent stone for those seeking to heal past emotional wounds, reduce stress and anxiety, and promote self-discovery and awareness. 
Easily adjustable, one size fits all.