Onyx Eggs, Onyx Bowls, Onyx Hearts and Onyx Spheres. Onyx is a type of Chalcedony that usually occurs as layers of a variety of colors to include, black, black and white, red and white, orange brown honey and white, etc. It is believed that this stone is good for connecting with ones highest vibration of energy without becoming ungrounded and staying in the present. I.e. this is a good stone for dealing with duality while not getting bogged down in it. Aids in making and deciding on what choices one should make as well as following the best course for achieving the highest good. Astrological Sign is Leo. Number Vibration is 6.