A blog of the photographs of Michael Popp who resides in an area around Louisville, Kentucky, USA. Click on the pictures to make them larger.
Saturday, October 02, 2010
Quartz var. amethyst
Amethyst which is a variety of quartz that is purple. Found at Serra do Mar. Rio Grande do Sul, Brazil.
Displayed at Smithsonian Museum of Natural History. This specimen was once part of 32000 kg geode!