Pliny’s views were probably derived from the ancient authorities of his time, particularly from Megasthenes, Chares of Mytilene, and Isidorus of Charace; and these curious fictions were incorporated by subsequent writers and influenced popular opinion for many centuries. With scarcely a single exception, every recorded theory from the first century B.C. to the fifteenth century evidences a belief in dew-formed pearls.
This theory is referred to by Thomas Moore in his well-known lines:
And precious the tear as that rain from the sky,
Which turns into pearls as it falls in the sea.
The Spanish-Hebrew traveler Benjamin of Tudela, in his “Masaoth” in Persia (from 1160 to 1173), wrote: “In these places pearls are found, made by the wonderful artifice of nature: for on the four and twentieth day of the month Nisan, a certain dew falleth into the waters, which being sucked in by the oysters, they immediately sink to the bottom of the sea; afterwards, about the middle of the month Tisri, men descend to the bottom of the sea, and, by the help of cords, these men bringing up the oysters in great quantities from thence, open and take out of them the pearls.”[[41]]
From the “Bustan,” one of the most popular works of Sadi, the Persian poet (1190–1291 A.D.), Davie quotes:
From the cloud there descended a droplet of rain;
’Twas ashamed when it saw the expanse of the main,
Saying: “Who may I be, where the sea has its run?
If the sea has existence, I, truly, have none!”