"Italian artificial stone” in
Lednice castle
rock-forming minerals in thin section
•The fragmental rocks (tuff)
consists of pyroxene and plagioclase of
glassy basalt. Magnification x 10, PPL
•The
glassy matrix in this rock has an
apparent discontinuous lamination caused by extreme
compaction and welding of original pumice fragments.Tuff.
Magnification x 30, XPL