Herbert Bloos (born 1965) has been running a mineral shop in Peiting, Upper Bavaria, for over 30 years. Even as a child, he was fascinated by minerals and fossils. Although the author was diagnosed with a pituitary tumor as a teenager and has been severely visually impaired ever since, he continued to pursue his hobby, which he later turned into his profession.

Herbert Bloos shares his wealth of experience and in-depth knowledge of minerals and crystals in his healing stone guide.