- Home
- Plan a Visit
- Explore the Institute
- Find Programs
- Get Involved
- Science Central
- For Teachers
- Contact
Every Rock Has A Story - Amethyst
This magnificent mass of amethyst quartz crystals formed from hydrothermal solution in a gas cavity in volcanic rocks, near Minas Gerais in Brazil. This type of crystal filled cavity is called a geode. As a side note, the ancient Romans mistakenly believed that amethyst gave one protection against drunkenness.



