Diamond

The diamond comes from the East, where it is found at night by its shining. It can overcome anything. No harm can come to a house containing a diamond; not even demons can enter. A person who possesses a diamond can overcome both men and beasts. Only the hot blood of the he-goat can dissolve diamond.

Bibliothèque Nationale de France Digitized Manuscripts

Manuscript

Bestiaire of Guillaume le Clerc