Amethyst
var. of Quartz
silicon dioxide
SiO2
Amethyst Geode with Agate Shell and a Single Clear Quartz Crystal
Dugway Geode Beds, Utah
Collected on 27 Aug 2006
Complex Amethyst Geode
Dugway Geode Beds, Utah
Collected on 27 Aug 2006
Closeup of Complex Amethyst Geode
Dugway Geode Beds, Utah
Collected on 27 Aug 2006
Amethyst Geode with Agate Shell
Wolf Creek, Colorado
Collected on 8 Oct 2008
Amethyst and Bixbyite on Rhyolite Matrix
Marysvale, Utah
Collected on 15 May 2001
Closeup of Amethyst and Bixbyite on Rhyolite Matrix
Marysvale, Utah
Collected on 15 May 2001