Little, if anything, is known of the prehistory of the Diquis, who were responsible for most of the goldwork at the Museo de Oro Precolombino. However, the history of goldworking in the New World is fairly well documented. It was first recorded (around 2000 BC) in Peru, from where it spread northwards, reaching Mexico and the Central American isthmus by 700–900 AD. All the ancient American peoples favoured more or less the same methods and styles, using a gold-copper alloy (called tumbaga) and designs featuring extremely intricate shapings, with carefully rendered facial expressions and a preference for ingenious but rather diabolical-looking zoomorphic representations – growling peccaries, threatening birds of prey, and a two-headed figure, each mouth playing its own flute. The precise function of these intricately crafted creations is still the subject of some debate since many of the objects show no sign of having been worn (there are no grooves in the pendant links to indicate they were worn on chains). Archeologists believe they may have been intended for ceremonial burial and, indeed, some were even “killed” or ritually mutilated before being entombed. Others may have been worn as charms protecting the bearer against illness and evil spirits.
The Diquis would have obtained the gold by panning in rivers, and it is speculated that in Osa, at least, the rivers routinely washed up gold at their feet. Diquis caciques (chiefs) and other social elites used their gold in the same way it is used today – to advertise wealth and social prestige. Ornaments and insignias were often reserved for the use of a particular cacique and his family, and these special pieces were traded as truce offerings and political gifts between various rulers, maintaining contacts between the caciques of distant regions. Indeed, it was the removal of native distinctions of social rank following the Spanish Conquest of the country in the seventeenth century that heralded the almost immediate collapse of the Costa Rican gold-making industry.
Although the Diquis were the undisputed masters of design, archeological digs in the Reventazón Valley suggest that gold-working could also be found among the peoples of the Atlantic watershed zone. When Columbus first came ashore in 1502, he saw the local (Talamancan) peoples wearing gold mirror-pendants and headbands and rashly assumed he had struck it rich – hence the country’s name. An early document of a subsequent expedition to the Caribbean coastal region of Costa Rica, now housed in archives in Cartago, contains the impressions of native wealth recorded by one gold-crazed Spaniard in Diego de Sojo’s 1587 expedition: “The rivers abound with gold…and the Indians extract gold with calabashes in very large grains…from these same hills Captain Muñoz…took from the tombs of the dead…such a great quantity of gold as to swell two large chests of the kind in which shoes and nails for the cavalry are brought over from Castile.”