A banded variety of rhyolite, some of which resembles rhyolite wonderstone, from near Rodeo, State of Durango, Mexico. It is being marketed (2008) as a new and rare material used in beads through dealers in Hong Kong. A commercial marketing term only.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.