Name Amethyst
Banded (b) 
Origin Namibia. Medium to light purple with white banding.
The name amethyst derives from the 13th century, from the Greek word amethystos, meaning remedy against drunkenness. A variety of crystallised quartz that occurs in colours ranging from deep purple to pale lavender. The presence of manganese in clear quartz produces amethyst. While the amount of iron content varies the strength of the purple colouration.