My grandmother was into crystal healing. She claimed they had healing powers, but I don't think there is scientific evidence on that, do you?
No I don't,I'm not into mysticism
I'm not sure it's mysticism. Its just a pseudoscientific alternative where people use crystals for medicine.
If it were,why is it not used the hospitals?
That is true, but I guess the stones have been used by cultures all over the world by many different people as healing objects. I guess if it's not harming anyone, its ok.
So when was the earliest time it was practiced?
divination, as prisms to direct sunlight towards medicine bowls, and in other forms of ritual, such as imbuing the strength and toughness of the crystal into one's heart.
In the English speaking world, crystal healing is heavily associated with the New Age spiritual movement: "the middle-class New Age healing activity "par excellence"". In contrast with other forms of complementary and alternative medicine (CAM), participants in crystal healing view the practice as "individuated", i.e., dependent on extreme personalization and
a god or, in my opinion, something that doesn't exist." In an interview with Radio.com in 2013, he also stated "In my opinion, I don't think believing in God is a victimless crime. It's not that I'm right and everyone else is wrong. If it was just people believing in God had no effect on the world, then it wouldn't matter. Then you can believe in what you want, if you want an imaginary friend that lives in the clouds that's fine