The estimated value of natural gemstones produced from U.S. deposits during 2012 was $11.1 million, a slight increase from 2011. U.S. gemstone production included agate, amber, beryl, coral, garnet, jade, jasper, opal, pearl, quartz, sapphire, shell, topaz, tourmaline, turquoise and many other gem materials.
|Publication Subtype||Journal Article|
|Series Title||Mining Engineering|
|Record Source||USGS Publications Warehouse|
|USGS Organization||National Minerals Information Center|