"My dear Watson, did you not see her jewelry? She favors onyx. Clearly, she is a priestess of the most foul!"
There is a difference between "Wears this stone as part of their jewellery" and "Wears this stone, in this very specific cut, setting and style, and displays it in this very specific cutting, setting and style in several places on her person."
There is a difference between "Wears pretty onxy earrings" and "Wears a diadem bearing a perfectly circular flat black disc as its central and only ornamentation, and bears an identical flat, circular, black disc on other parts of her outfit."
One of them is clearly, and deliberately, symbolic of Something.
This is especially relevant when that particular symbol is, expressly, the symbolism of a particular divine entity, in a realm where these entities are present, known and active.
Are you struggling to understand the difference between these things? If so, I can attempt to explain for you further. As always, of course, you can be dismissive or disparaging of that all you like; that's your call... but I'd personally prefer it if you remained polite, rather than launching into snarky ridicule.
