mica slate
cat-silver
glimmer
isinglass
mineral
translucent substance
transparent substance
Muscovite
biotite
lepidolite
paragonite
phlogopite
zinnwaldite
alum
asbestos
augite
chalk
feldspar
flint
gneiss
graphite
gypsum
hornblende
limestone
marl
obsidian
onyx
pumice
quartz
sapphire
schiste
shale
talc
Formica
Micah
pica