Goshen stone is an unusual variably colored variety of mica schist found mostly in New England region of the United States. It is quarried and sold as a landscaping stone. The stone sells for approximately 100 US dollars a ton.
Goshen stone appeared in US national headlines in 2007 when Matt White, a former Major League Baseball pitcher then pitching in the minors, discovered approximately 2 billion US dollars' worth of the stone on property near Cummington, Massachusetts he had recently purchased.
References
Goshen stone Wikipedia(Text) CC BY-SA