Crystals and stones
What each stone is actually made of, how hard it is, where it comes from — and what it has traditionally been used for. Both halves, kept separate.
Stones chosen for a purpose
Traditional pairings — what people have historically reached for, and why.
Folklore and geology, labelled
Every stone here carries its chemical formula, Mohs hardness and mining origin — things you can check. The traditional associations are here too, but marked as traditional. Mixing the two without saying which is which is how this subject got its reputation.