Note 765 — ARTIFICIAL PEARLS.
William Johnston translation
Abhand. der Schwed. Akadem. der Wissenschaften, vol. xxxiv. p. 89. The author of the paper alluded to had a mussel with such artificial pearls, which had been brought from China. It was a Mytilus cygneus, the swan-mussel, or great horse-mussel. Mention is made also in Histoire de l’Académie des Sciences de Paris, année 1769, of a stone covered with a pearly substance which was found in a mussel.