Black Onyx is a very protective stone. It is said to absorb bad and negative energy for the wearer. Onyx also helps to build physical and emotional strength in times of stress. 
Pearl signifies faith and clarity. It helps with your focus and integrity and will bring truth to a situation. 
All jewellery is made to order so the stones which are photographed will vary slightly in size and colour but very similar Onyx and Pearl's will be used.