only a few places where the mineral can be mined in sheets of one foot
square or larger, but the vast heaps of waste mica can be utilized by
building up the sheets artificially. This can be done by treating it
with shellac. There are fortunes in waste mica quarries for those who
know how to utilize the countless tons of fragments. The field is
especially promising in North Carolina and Georgia, where immense
quarries abound.