Gratis E-book, 15 pagina’s (Engels)
- What is Amethyst?
- Color in Amethyst
- Amethyst Crystals
- Physical Properties of Amethyst
- Geologic Occurrence of Amethyst
- Amethyst by the Ton
- Amethyst Treatment to Citrine and Prasiolite
- Care of Amethyst Gems and Jewelry
- Synthetic Amethyst
- Amethyst Simulants
- Amethyst as a Healing Stone?