It's not in Mexico, but specialized craftsmen in this civilization made beads out of Spondylus shells. For 10 points each:
[10h] Name this civilization that built pyramids at sites like Huaca del Dragon in its capital. This civilization was defeated and annexed in a war by Topa Inca Yupanqui.
ANSWER: Chimor [or Chimú]
[10e] After the Inca Empire's conquest of Chimor, many treasures and artisans from the Chimor capital of Chan Chan were brought to this Inca capital city.
ANSWER: Cuzco [or Cusco]
[10m] After a number of these systems in the north of Chan Chan were destroyed, the Chimor were forced to refocus their economy on foreign resources. These systems helped sustain chinampas in Tenochtitlan.
ANSWER: canals [or canal systems; accept irrigation systems]
<Govind Prabhakar , History - World - Americas>