XXIII.
CLOROPHANE.
This is
a kind of translucent felspar found in Corno-vaglia, in Siberia, and
principally at New Stratford, in Connecticut, United States of America.
It presents beautiful variegated colours, amongst which red, green, blue, and violet predominate.
It
is prized for its phosphorescence. When placed over a flat piece of hot
iron, in the dark, it emits the light of a beautiful green emerald.
The
clorophane is also found in Massachusetts, and there it is in large
pieces, opaque, and of a purple colour. This variety, when placed over
a flat piece of heated iron, acquires phosphorescence more easily, and
becomes quite white.
