![](http://www.alamy.com/thumbs/6/F79BD878-7A77-47A9-8B41-A16AF1DEC44B/DTGK17.jpg)
Amethyst
Amethyst is the purple variety of quartz (silicon dioxide) and is a popular gemstone.
Size: 1928px × 2480px
Photo credit: © Natural History Museum, London / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: amethyst, dioxide, gem, gemstone, mineral, purple, quartz, shot, silicate, silicon, studio, studioshot, tectosilicate