the operation that these cracks do not become too conspicuous upon the surface.1
Boot (ii. 53) gives a long list of the medicinal virtues of the
Emerald, then firmly believed in. If worn, it was a preservative
against epilepsy (as Marbodus too teaches), cured the dysentery, and
preserved the chastity of the wearer, or else betrayed its violation by
immediately bursting into fragments.2 De Boot gives a receipt for preparing the Tindura Smaragdi— a most efficacious medicine in dysentery, epilepsy, and malignant fever.
the Middle Ages the value of this gem was enormous. Fran. Maria, Prince
of Urbino, paid 113 gold pieces for an Oriental Emerald weighing only 2
carats. Cellini puts it at 400 gold scudi the carat, or four times his
estimation of the Diamond.