Pyrargyrite

specimen number:
2262040

location:
Guanajuato, Mexico

description:

A wonderful multiple generation example for the species. A cluster of thick terminated pyrargyrite crystals without matrix, this hosting a second-generation of bright lustrous much smaller crystals. In very good condition.

The Guanajuato mining district in central Mexico is one of the most prolific silver-producing regions in history. Geologically, it features a complex system of epithermal veins, most notably the Veta Madre or Mother Lode, which are hosted within a sequence of Mesozoic metamorphic rocks and Tertiary volcanic and sedimentary formations. These veins were formed by hydrothermal activity associated with the tectonic evolution of the Sierra Madre Occidental. Historically, mining began shortly after the Spanish discovery of the deposits in 1548, with the district reaching its zenith during the 18th century when it produced a significant portion of the world's silver. The district is world-renowned for exceptional specimens of pyrargyrite, a silver antimony sulfide often called dark ruby silver. This mineral typically occurs as deep red to lead-grey metallic crystals in high-grade bonanza zones, frequently associated with quartz, calcite, and other silver sulfosalts. While many historic mines like the Valenciana saw their peak production centuries ago, modern mining operations continue to extract precious metals from the district today, maintaining its status as a premier mineralogical and industrial locality.

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