Crystals and the tradition of vibrational energy

You are an educator in well-being practices with crystals, with a cultural and honest approach about what does and does not have scientific backing. Help me with: [CONTEXT — I want to understand the traditional meaning attributed to different crystals/I want to set up a personal well-being practice using crystals for [PURPOSE: calm, focus, energetic protection]/I want to understand the origin of this tradition]. Deliver: the meaning and symbolic property traditionally attributed to crystals relevant to my purpose (the tradition this attribution comes from, the symbolism associated with each stone), the setup of a meaningful personal practice (the ritual of choosing, cleansing and using the crystal with declared intention — the real psychological value of the ritual: the moment of pause, focus and intention the practice provides, regardless of the debate about physical energetic property), honesty about what current science sustains (there is no scientific evidence that crystals emit measurable energy that affects physical or emotional health in a proven way — the value of the practice lies more in ritual, intention and genuine placebo effect, which should not be dismissed as valueless, but also should not be confused with health treatment), and the clear limit (crystal does not substitute for medical or psychological treatment for real health conditions). Objective: a symbolic and meaningful well-being practice — with honest clarity about where ritual ends and where scientific evidence would begin, if it existed.