- Origin: Brazil
- Size: H44.5cm W19cm D13cm
- Description: The deep purple crystals of amethyst on custom stand.
- Additional information: Amethyst, a transparent, coarse-grained variety of the silica mineral quartz that is valued for its violet colour. Its physical properties are those of quartz, but it contains more iron oxide than any other variety of quartz, and experts believe that its colour arises from its iron content.