What do you think a good fusion between opal (Not the cannon one) and pink tourmaline would be? Since they are both the October birthstones, perhaps something to do with Autumn or Halloween? And (disregard this bit if it's too much) what would be a good corrupted form for opal and pink tourmaline?
Hmm, Pink Opal (Known by some as Andes Opal) seems like an obvious choice. But lets delve a bit deeper shall we?
Here is an article that lists a handful of stones that are good for wiccans&pagans to use on Halloween, funny enough that Opal is on that list, but i digress! Out of these, I would recommend Botswana Agate, (Pink) Calcite, or perhaps even, a Petrified Wood?
Corrupted forms are a bit trickier, given I don’t know if there is any sort of pattern to their deciding features, but I will certainly give it a shot!
Opals, in medieval times, were said to ‘make a man invisible whenever he wished’, and was thus called the Patron of Thieves. Metaphysically, it amplifies traits and thoughts- good or bad, so with these two bits of information in mind, perhaps something vaguely humanoid, but with beast-like features accentuated, and the ability to turn invisible much like one we’ve seen before?
As for Pink Tourmaline, a scientist in dutch believed that this stone, when wrapped in silk and placed on a child’s cheek, would induce sleep. In certain parts of the world it is also said to help people wake from a dream of illusion. So perhaps a corrupted Rubelite would take on the appearance what a person fears most in their dreams? Or maybe even something cloud-like, as clouds tend to be associated with dreams and sleep.
Hope this helps!