New look at turquoise treasures of the Aztecs

Many visitors to the American South West come back with turquoise jewellery: the Native American people of Arizona and New Mexico exploited local sources, and modern craftsmen have developed a prosperous industry. Thirty years ago the archaeological scientists Garman Harbottle and Edward Sayre used neutron activation analysis to show that turquoise mosaics from Mexico, found as far away as the great Maya city of Chichén Itzá in Yucatan and dating back to around AD900, used raw material originating in the Cerrillos mines between Albuquerque and Santa Fe in New Mexico, an overland distance of some 3,200 km (2,000 miles).

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