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About 200 B.C., Bolos of Mendes, an Egyptian chemist of whom little else is known (Sarton, 1927; Partington, 1970)) compiled a multivolume set of papyrus rolls under the title Baphilza ("Dyeing"), which dealt predominantly with the techniques of coloring various substances. This work included sections on metallurgical processes, on the dyeing of wool and other objects, and on various techniques of "improving" gemstones by coloring. All copies of this work, which were presumably available in major libraries such as the one at Alexandria, have been lost, as was the fate of many works from pagan antiquity. Before this happened, however, the whole or parts of this text had been circulated in copies made by scribes. Pliny, the Roman historian of the first century A.D., may have known this work:

The Pearl in the Chicken: Pearl Recipes in Papyrus Holmiensis