last edited: 11/17/18 number of photos: 7
Amethyst is purple quartz, SiO2
Mineral information on quartz
Amethyst by Audrey LaClair
amethyst cabochons: A B*
tumble polished amethyst: A B
amethyst in jewelry
amethyst beads: A B C
Photos are copyright free for non-commercial educational uses.
Just credit photos to R.Weller/Cochise College.