Giacomo Casanova,
The Memoirs of Jacques Casanova de Seingalt…
“ Madame de Chauvelin, who knew something about precious stones, said that they would never lose their brilliance, as they were diamonds of the first water."It is not so?" she added, to Agatha, who in the candour of her heart confessed that they were imitation, and that I had lent them to her.At this Madame de Chauvelin burst out laughing, and said,—"M. de Seingalt has deceived you, my dear child. A gentleman of his caste does not lend imitation jewellery to such a pretty girl as you are. Your ear-rings are set with magnificent diamonds." ”
