|(Emmonsite image found on mindat.org)|
Thursday, October 18, 2012
Gemstone of the Week: Emmonsite
Emmonsite is a very unusual looking gemstone, with all of its spindly, lichen-like crystals. It was discovered in 1885 and is named for geologist Samuel Franklin Emmons. Emmonsite is a hardness 5 and has a vitreous luster. The crystals tend to be transparent to translucent and is yellowish-green colour. It is a secondary minerals that forms by the oxidation of Tellurium bearing minerals. Emmonsite is found in: Japan, Honduras, Mexico, and the states of Nevada, South Dakota and Arizona.