October 13, 2013 | geology.com
Ametrine, a combination of amethyst and citrine is a bicolor quartz and a gemstone of growing popularity.
It is produced...
October 21, 2013 | Geology.com
A few minerals have an interesting physical property known as "fluorescence". These minerals have the ability to temporarily absorb a...
Rock and Mineral Projects at DonorsChoose.org
December 3, 2013 | DonorsChoose.org
DonorsChoose.org is a website where K-12 teachers post projects that they would like to have funded and anyone anywhere can...
Arizona Mining Review for October
November 1, 2013 | Arizona Geological Survey on YouTube
News and events on mining in Arizona during October, 2013.
** Nyal Niemuth takes a hard look at AZ minerals industry...