Libellus de lapidibus preciosis nuper editus.

The earliest medieval lapidary, and also the one which was quoted most widely. By the fourteenth century it was translated into French, Provençal, Italian, Irish, and Danish, and it was the first of Marbodius's works to be printed. Marbodus, Bishop of Rennes, wrote his lapidary in 734 Latin hexameters between the years 1061 and 1081. The poem described 60 stones, including their magical and medical properties. 14 printed editions appeared between 1511 and 1741. Digital facsimile from Google Books at this link.