Tetrahedrite with Chalcopyrite, Quartz

specimen number:
2063279

location:
Aranzazu Mine, Concepcion del Oro, Zacatecas, Mexico

description:
Non-lustrous but sharp crystals of tetrahedrite measuring to 0.6 cm on edge set along one side of this brecciated matrix that is completely coated with colorless small crystallized quartz. Golden crystallized chalcopyrite is scattered throughout, as well as colorless crystals of calcite. In good condition. The specimen comes with a previous label from the collection of Ray DeMark.

The Aranzazu Mine, situated in the historic mining district of Concepcion del Oro in Zacatecas, Mexico, features skarn-type copper, gold, and silver mineralization associated with intrusive rocks altering surrounding carbonate sequences. Documented mining activity in this rugged mountain region dates back nearly 500 years, beginning with Spanish colonial prospecting for precious metals in the sixteenth century. Modern commercial exploitation has evolved through various owners into an active underground operation focusing on polymetallic extraction, making it a prominent part of the enduring mining heritage of Zacatecas.

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