Andesin, a kind of felspar containing both soda and lime, and named from being first obtained in the Andes.
“Only very fine, hard granite, with scarcely a grain of felspar,” he said.
These consisted chiefly of quartz, felspar, and a silicious petrifaction of woody appearance.
For this purpose the proportions of the flint and the felspar must be increased.
The essential minerals, hornblende and felspar, rarely show crystalline outlines, and this is generally true also of the others.
It is made from American kaolin clay, with a large admixture of felspar.
felspar introduces him as the Canadian representative of the firm whom he has never seen before.
The rock was found by Watson to be gneiss, rich in mica, felspar and garnets.
It is at this point in general finely grained, but the felspar partly decomposed, with distinct crystals of felspar unchanged.
Quartz also is usually present in these rocks, but felspar is rare.