Onyx is another variation of the SiO₂ crystal. Its appearance is due to the banding of chalcedony, a very fine grain consolidation of the previously mentioned crystal. Onyx can be found anywhere in the world, being a form of quartz, after all.
Black Onyx is particularly good with supporting people through times of crisis, bolstering their stamina and supporting their emotional and physical strength when life demands it. Its energy is important to preventing someones from draining.