'Serpentina dell'Elba', from the island of Elba, Livorno, Tuscany, Italy
Geological description:
Heavily alterered ?peridotite/pyroxenite; now composed mainly of actinolite.
Comments:
Although not a serpentinite, this stone could easily be mistaken for one. Examination under a microscope shows the green colouring is largely confined to fibrous masses of actinolite crystals.