Likely Source and Trade Patterns
Most of the jade work in Costa Rica was done with a particular type. It was a deep, blue-green color, and the same type the Olmecs used. In 1998 an enormous region of this particular jade was uncovered after a hurricane in Guatemala. The area is located in south east Guatemala In the Motagua River Valley. It is about the size of Rhode Island, and has evidence of ancient mining. This is the likely source of both the Olmec and Costa Rican jade. This implies a significant long-distance trade hundreds of years before Christ. Postulated by David Mora there was a direct exchange network between the previously mentioned area in Guatemala (in the Mayan lowlands) and the northwestern/ central areas of Costa Rica between 300 BC and 800 AD, in which Costa Ricans obtain jade. Also, the jade tradition died down due to the collapse of (the Olmec's) Copan, the presumed trade center for the jade.
Read more about this topic: Costa Rican Jade Tradition
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