spangles
Small discs and geometrical shapes of shining
metal used for the further ornamentation of
embroidered bindings. Spangles were never used to
any great extent on velvet, but found their
greatest use on satin embroidered books. They were
usually held in position either by a small section
of PURL , or by a
seed pearl, in both cases very effectively, so
that the use of gimp or pearl was not only
ornamental but served the same protective purposes
as bosses. (111 )