Onyx

Social Properties: Bring charm, success in deliberating with ministers and kings, and his words will be perceived. 

Known Negative Effects: A number of sources mention that Onyx brings fights and arguments as well as worries and grief into one’s life, and could cause bad dreams, phlegm, and excessive urination.  It is therefore advisable to balance these possible effects by wearing it together with Sardonyx

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however, in other writings you will find the following properties:

Black onyx has been associated with regeneration and new beginnings. Black onyx is thought by some to have protective qualities, making it advantageous to carry when traveling. It is said to be useful in fighting basic fears and helping to move beyond bad relationships--as well as to heal old emotional wounds. The Romans associated onyx with courage and it is thought to be useful when one is defending him/herself against unfair criticism.

these properties are not supported by our certification.