These wonderful pictures - similar to landscapes - originate from the variable depth of colouring, resulting from the impregnation and transformation of the iron compounds included in the stone. The characteristic patterns are caused by infiltrations of manganese oxide.
Age: These stones are about 50 mio. years old
Origin: M. Apennines, Italy
This stone is unbroken, it measures about 11 x 6,5 x 1 cm.
SOLD