Recent archaeological work at Colha and at other localitites in the geographically restricted chert-bearing zone of northern Belize has revealed large-scale exploitation of chert for stone tool production. Workshops dated during the late Preclassic period signal the beginning of craft specialization in chert working that continued in the late Classic and into the early Postclassic periods. Secular items such as large oval bifaces, tranchet bit tools and prismatic blades, as well as nonsecular eccentrics and stemmed macroblade artifacts are distinctive of the late Preclassic and late Classic workshops. The distribution sphere of Preclassic and Classic period chert tools has been traced to several contemporaneous sites that lie beyond the chert-bearing zone to the north. Colha has been identified as the primary production and distribution center during the late Preclassic period; although it remained a production center in the late Classic period, the main center for distribution may have shifted ito Altun Ha.