Chemistry of minerals, crystals and gems
- Gemstones 2nd Ed. (Earth Series)Oldershaw, Cally; Woodward, Christine W. ; Harding, Roger R.12,62 €
- Healing Chrystals And Gemstones: From Amethyst To ZirconPeschek-Bohmer, Flora; Schreiber, Gisela15,68 €