Mexican Onyx helps to reduce our stress levels allowing us to achieve peace of mind with time for reflection. It encourages self-control and increases our self-confidence. It is a supportive stone and an ideal one to carry in times of difficulty and/or confusion.  Mexican Banded Onyx eliminates apathy and negative thinking and reduces stress. It is also said to both sharpen our wits and to help us make good decisions. 
 
Measurements are all approximate
93mm to 100mm tall
16mm in depth
All can stand