Archaeologists have long noted the presence of green obsidian artifacts in a number of Maya sites and have recognized that they were manufactured from the obsidian of the Pachuca source in central Mexico. Viewed as evidence of Teotihuac�n influence, these finds were initially explained in economic terms as commodities in an exchange of goods that had a substantial impact on the economies of the Maya and on the development of the obsidian industry in Teotihuac�n. However, when the contexts of the finds are examined it becomes clear that the significance of the artifacts was more symbolic than economic. The forms include prismatic blades, bifacially worked points and knives, needles, sequins, and some eccentrics. These are often recovered from ritual contexts, in association with other evidence of Teotihuac�n influence. They apparently served to express a variety of relationships with Teotihuac�n, ranging from actual Teotihuacanos proclaiming their identity to the attempts of Maya elite to forge some social affiliation with the city. Although most of the finds of green obsidian consist of only one or a few pieces, some contexts, such as the tombs of mounds A and B at Kaminaljuy�, produced more substantial amounts. Nevertheless, despite these occasional impressive finds, green obsidian does not seem to have been a major import, and it is clear that the Teotihuac�n obsidian industry had largely attained its Classic-period structure before the Maya demand developed. Although the flow of central Mexican obsidian to the Maya region was not negligible, it could not in itself have had a major effect on either economic system.