From :
ScienceDaily: Ancient Civilization News
The ancient Maya civilization used a rare type of clay called “palygorskite” to produce Maya blue. Combining structural, morphological and geochemical methods, researchers have defined the features of palygorskite clay on the Yucatan Peninsula in Mexico. These findings will make it possible to ascertain the origin of the materials used to produce this pigment, which survives both time and chemical and environmental elements. – Please Ream More..
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