I have not quite been able to get to the bottom of the suggestion that pearls are for tears and that they are unlucky for brides for the explanations are unclear. Personally I would rather eschew matrimony than give up pearls.
Front Row (20 minutes in) a report on the sound installation Surround Me: A Song Cycle for the City of London by Susan Phillipsz, with recordings of her singing Elizabethan songs in six locations around the City of London. There was a short extract of New Oysters, to be heard in Change Alley; and two other recordings are John Dowland's Flow of Tears, to be found under London Bridge, and Lachrimae or Seaven Teares in Milk Street. Very apposite. I shall make sure I am wearing pearls when I hear them.