Black Onyx Gemstone Education

Common treatment for Black Onyx is dying. You should always assume it has been dyed.  Those who note otherwise are likely deceiving you.

Avoid the direct sun or bleaches. Direct sunlight over time can cause Black Onyx to fade and bleaching agents can create problems with dying. 

Avoid wearing it while swimming where bleaching agents may be present. Very Humid atmospheres may also create issue (including swimming pools or otherwise at health clubs).

Clean with soft toothbrush, warm water, and mild dish soap that does not contain bleaches.  Blue Dawn is recommended.  Polish up. 
If you use tarnish removers on your sterling silver, do not get it on the gemstones. Avoid ultrasonic, steam and store bought jewelry cleaners.

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