In order of Apperance

Picture Citations

http://www.valley-of-fire.com/elephant-rock/

http://www.enchantedalchemists.com/Amethyst-Geode

http://en.m.wikipedia.org/wiki/Sand

http://www.britannica.com/EBchecked/topic/88899/calcite/images-videos/139343/coquina

http://commons.m.wikimedia.org/wiki/File:(1)shale_from_Asgard_Swamp_mine.jpg

https://www.flickr.com/photos/tjflex/358359211

http://en.m.wikipedia.org/wiki/Obsidian

http://geology.com/rocks/granite.shtml

http://skywalker.cochise.edu/wellerr/rocks/mtrx/gneissL.htm

http://en.m.wikipedia.org/wiki/Marble

http://geology.com/articles/difficult-rocks/

http://feelgrafix.com/881007-rocks-wallpaper.html

http://pofff.com/2011/10/12/fluorite-cool-stone-of-many-colors/