The floating stones also called Restingolitas, were created by an underwater volcano south of the Island El Hierro, one of the Canary Islands, between October and November 2011 but certainly before November 26th. The name is derived from the nearest town La Restinga, where the rocks could be seen floating from the harbor. Sample taken and sent by Ian Carson. It is most likely from the early stage of the eruption. Images were taken from the “white” and the “black” part of the stone.
Solid earth net published a chemical analysis on the early Restingolitas. www.solid-earth.net/3/97/2012/se-3-97-2012.pdf
From #20 to #27 I zoomed zoomed zoomed into the center till I reached a magnification of 10000 fold.