Joachim Goebel is an international lecturer, trainer, seminar leader, and industrial consultant, who has been researching gem waters since 1998. Michael Gienger (1964-2014) was one of Europe’s most respected experts on crystals and their uses, a field in which he had been active since 1988. He started collecting minerals in 1972, and in 1985 a successful self-treatment with healing crystals inspired him to pursue further training as an alternative healing practitioner. He was trained in shiatsu and completed a two-year apprentice in shamanic healing. He went on to author more than 20 publications, a number of which have become standard works in their field and have been translated into 11 languages.

"In Gem Water, the authors, explain how to prepare and use more than 130 crystal water for therapeutic treatments. Do's and don'ts are given as well as some actual recipes and mixtures along with their effects. Beautiful colour photos enhance the book throughout."

• The Gem Water Handbook 4 Basic principles of preparing gem water 6 Mineral water and gem water 6 Gem water as drinking water 8 Gem water as a healing medium 9 Water quality 11 Gem quality 12 Beware poison! 13 The preparation of gem water 16 General prerequisites 16 Check list of items required 17 Purification of the gems 17 A personal collection 19 Water and vessels 19 Preparing the gem water 20 Decanting the gem water 20 Storing the gem water 21 Drying the gems 22 Numbers and amounts 23 The preparation methods 26 Direct placing of gems in water 26 The boiling method 27 The water vapour method 27 The test tube method 28 Conducting with crystals 28 Glasses of water standing on gem slices 29 Water in gem dishes 29 Effects and applications 30 External applications 30 Internal applications 31 Quantities and intensities 32 Rhythm and dosage 33 Initial reactions 34 Limits of applications 34 Gem water mixtures 36 Warning about "wild mixtures" 37 Tips about the creation of gem water mixtures 37 Tried and tested gem water mixtures 39 Gem water bath additives 54 Index of gem waters A-Z 56 Appendix 92