...not often one catches out a Roman Historian, but Obsius(name/Ethiopia) for root of obsidian is
a whopper, e.g., Ob(s)/opitzin/pitzini(N)=split/part/break/crack/hole,= pitzinia/opitzini(N)=
nitla-pitzinia(N)=break/shatter,=obs/op/itz/t/(si)d i(a)n/i(Letra). obvious.
