Here's why:
* No Gemological Conflict: Rubies and onyx are different minerals with different properties. They won't react to each other in any way if worn together.
* No Known Metaphysical Conflict: Unlike some gem combinations believed to clash energetically, there's no widespread belief that ruby and onyx are incompatible. In fact, some people find the combination aesthetically pleasing or even synergistic.
Aesthetic Considerations:
The main thing to consider is whether you like the way they look together.
* Color Contrast: Ruby (red to pink) and onyx (typically black) offer a strong, dramatic contrast. This can be very striking and visually appealing.
* Setting Style: Consider the styles of settings and metals used. A bold, modern setting might suit the contrast, while a more delicate, vintage style might not.
In summary, wear ruby and onyx together if you enjoy the look! There's no reason not to.