Alum is a mineral used in chemistry in many ways from anti transpirant deo sticks to taxidermy and tanning.
Its esoteric use is various.
In Cuba is used to clarify, illuminate a situation, a person. In Cuban Spiritualism its often associated to Saint Clara, to have clear answers and visions. Within Ocha/Ifa is used as ingredient for making an Eleggua.
I have lately heard that the curanderos of Peru use it also to remove fears and traumas, los “sustos”, with a prayer.
Thanks for the gift to Arianna L.
Brighest blessings, no fear, don’t panic 🙂