- И на жемчуге бывает царапина
- See И на солнце есть пятна (И)
Cf: The best cloth may have a moth in it (Br.). Every bean (white) has its black (Br.). Не who wants a mule without fault, must walk on foot (Br.). Nothing is perfect (Am., Br.)
Русско-английский словарь пословиц и поговорок. Академик.ру. 2013.