Note: As only Black Onyx exists Blue and Green Onyx tradenames can be misleading and Blue Onyx is actually Calcite as well as Green Onyx is only Calcite 
 
Blue Onyx is a stone that will increase your happiness and contentment in life. It will also enhance your intuition and strengthen your resolve in changing your bad habits. It's a strength-giving stone that will be good for people who are always under extreme physical, emotional, or mental stress.