@rightwriter Rav Hirsch ZT”L discusses the 12 stones of the Choshen. What makes you think they were selected because of healing properties?
I did a bit of Googling. I was hard pressed (read: could not) to find a single website about gemstone therapy and crystal healing that was not all about Eastern avodah zara. The whole concept is riddled with things like “reiki” and “chakras”, often subtly hidden behind innocent sounding nonsense phrases like “body energy” and “flows of power”.