The Etruscans carved many of their works from tufa, a soft porous variety of this calcium carbonate rock
Figure 2: Underground tuff mine with calcium carbonate deposits (
Author)... [DOC] [TLE] Historic Mineral Pigments: Colorful Benchmarks of Ancient ... [PAR] Nov 20, 2015 ... De Coloribus (or On Colors), a work far ahead of its time, is a treatise ...