each held something of rare and beautiful workmanship-a delicate glass flacon whose stopper was an enormous emerald ; a crown with a diamond in the center that did not look as if it would fit any human head ; a pendant in the shape of an angel whose wings were clockwork cogs and gears ; and in the last case , just as isabelle had promised , a pair of gleaming golden rings shaped like curling leaves , the faerie work as delicate as baby 's breath .