South Sea pearl-shells are common ... By placing the isinglass between two finely-polished surfaces of mother-of-pearl, we obtain a film of artificial mother-of-pearl, which, when seen by single ...

What is it? Well, many of the manicures feature this ethereal, pearly, opalescent finish, a bit like the mother-of-pearl-insides of a mollusc shell. So there, I’m calling it: shell nails are ...