Origin of silex
Examples from the Web for silex
In clay it finds the best constituents of its development—moisture, silex, lime and alumnia.Talks about Flowers.|M. D. Wellcome
The earthy parts were silex and magnesia, in which were interspersed small grains of metallic iron.
The way down to the fiery heart of the earth had simply grown up by deposits of silex on the sides and at the bottom.Among the Forces|Henry White Warren
Then, on the terrace above, there is an arcade paved with blocks of silex, and on one side shops.Rambles in Rome|S. Russell Forbes
As in all Acantharia, the spines consist of acanthin, not of silex.