"Olmec Jade Half Spherical Bead"
Rare jade bead from the Olmec period, 800 BC its half-spherical shape certainly made it possible to collect blood during self-sacrifice ceremonies. Very rare object due to its function and difficult to find old collection: Edward H Merrin NYC 1968-69, Ex David Bramhall 1960. arte primitivo 2021. rest of concretions. 
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TRÉSORS Magazine
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