The distinctive character of the Spanish monarchy all along the modern age was the domination on the main producing zones of silver and mercury in the planet, which provided practically uncontestable a comparative monetary advantage to her, specially during the period of century and a half following the introduction of the silver-standard in the Ming's China, during which the bimetallic relation was extremely favorable for the silver. This allowed the imperial power to rest on an very simple combination of extractive, logistic and financial policies, whose privileged indicator is the market of the mercury, that reconstructs in this work.