peperino
/ˌpɛpəˈriːnəʊ
/noun [mass noun]
A light porous (especially brown) volcanic rock formed of small grains of sand, cinders, etc.Built of uniformly gray, granular volcanic tufa, or peperino, the courtyard was completed by 1579, as recorded in the building documents....
- They played up the contrast between plastered surfaces and the peperino stone in the footings, projecting windowsills, and coping.
- Peperino tuff is best known as building stone heavily utilized by the ancient Romans.
Origin
17th century: Italian, from pepere 'pepper' on account of its grainy appearance.