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Nenfro

Nenfro is a volcanic rock, gray tuff or banded trachyte (Brocchi) or leucite phonolite lava (Rosenbusch) with a soft but compact structure, typical of the Viterbo region that the Etruscans used in their sculptures of northern Lazio Cimini hills near Rome, Italy.

One of its features is to take a pinkish tint when drying.

References