Black Onyx is one of the most common stones used in jewelry, pendulums, and as tumbled stones. Onyx is a type of chalcedony, which is part of the quartz family.
Black Onyx is known as a grounding and centering stone, that has been used to balance a person's mental and emotional aspects. Onyx is, in general, a strengthening stone. It can assist you with specific tasks in which strength is required, and can also help to calm fears.
Onyx is said to increase a person's self control, assists with making decisions, and increases one's intuition and self confidence.
If you want to enhance your meditations or dreams, Black Onyx will help to strengthen what you see. Onyx is also associated with fidelity towards their partner.