Emerald says: "§ 23.23(c) It is unfair or deceptive to use the word "laboratory-grown", "laboratory-created", "[manufacturer name]-created", or "synthetic" with the name of any natural stone to describe any industry product unless such industry product has essentially the same optical, physical, and chemical properties as the stone named." Emerald is regarded as the traditional birthstone for May as well as the traditional gemstone for the astrological signs of Cancer. One of the quainter anecdotes about emeralds was told by the 16th-century historian Brantôme, who referred to the many impressive emeralds the Spanish under Cortez had brought back to Europe from Latin
The Castafiore Emerald of her emerald. Although "The Castafiore Emerald" received critical acclaim for making its characters follow a lead of false trails, it was not a commercial success due to the experimental nature of its narrative. It was published as a book by Casterman shortly after its conclusion. Hergé continued "The Adventures of Tintin" with "Flight 714 to Sydney", while the series itself became a defining part of the Franco-Belgian comics tradition. The story was adapted for the 1991 animated series "The Adventures of Tintin" by Ellipse and Nelvana. Tintin and Captain Haddock are walking through the countryside of the fictional town