Victor Fet described "mica
(semi-transparent layered mineral, Russ. "slyuda") was used for windowglass in
medieval Russia, hence Muscovy glass; a connection to Zembla glassworks."
A very interesting connection with Sudarg and
Zembla glassworks!
Thank you, Victor, also for clarifying the
reference to coral-red rowan in October.
I learned that "muscovite"
is the white mica. Mica in other colors have different names: the
black mica is biotite, the dark-green is fuchsite, and
the lilac-colored, lepidolite." I was only familiar with
the "fuchsite" that carries a joycean "snooty green"
coloring. The iced sheets on the
pavement which kids love to shatter, as V.F noted, break in a
peculiar "mica" layering kind of way and in Zembla they
must be crystal white, too.
Jansy