624 A.D.
624 A.D.: The Cerrillo workshop site in western Puerto Rico was actively utilized for flintworking during the transition to the Ceramic age.
624 A.D.: The Cerrillo workshop site in western Puerto Rico was actively utilized for flintworking during the transition to the Ceramic age. Archaeological evidence indicates that while the site reached its peak use in this period, the exploitation of local flint nodules likely began during the preceding Archaic age.
Source · p. 68
Rouse, The Tainos, 68