Copal from bowl (IMAGE) Field Museum Caption The underside of the copal removed from the Maya tripod pottery bowl shows evidence that helped solve mysteries surrounding the ancient production of Maya Blue. Fine blue and white grains were removed for analysis and indicated the presence of Maya Blue and palygorskite, indicating that the pigment was being made near Chichen Itza's Sacred Cenote into which the bowl (containing this copal) was thrown. Credit Photo by Linda Nicholas; Courtesy of The Field Museum. Usage Restrictions only with this story License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.