Analysis of information sources in references of the Wikipedia article "Tuff" in English language version.
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: CS1 maint: location missing publisher (link)...walls of monumental buildings at Ani (including the fortifications) were built of smoothly dressed blocks of tuff stone...
The city, whose population is now upwards of 800,000, has been rebuilt in the rosy volcanic stone called tufa...
...pink tuff is rare outside of the region and Yerevan is the only major city built out of this stone.
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: CS1 maint: archived copy as title (link){{cite web}}
: CS1 maint: archived copy as title (link)...pink tuff is rare outside of the region and Yerevan is the only major city built out of this stone.