This specimen features small pyrargyrite crystals, some of which are broken, along with masses of pyrargyrite intergrown with small calcite crystals. The majority of the pyrargyrite crystals are hexagonal prisms, some of which are terminated by very flat rhombohedral faces. Additionally, a few scalenohedral forms are present, contributing to the specimen's variety. Despite some crystal damage, there are several good microcrystals visible too.
This is a classic, old-time silver ore specimen from the historic Adelbert Mine in the Czech Republic. The specimen is richly covered in lustrous, reddish-gray pyrargyrite, seen on all sides of the calcite-rich matrix. The highlight of this piece is a well-formed, 7mm elongated pyrargyrite crystal, which sits prominently at the top-center. Pyrargyrite is commonly found in hydrothermal veins, both as a primary and secondary mineral, and also occurs in oxidized silver deposits.
This particular specimen, once part of the Nemeczeck collection, was acquired by Dr. Tarassoff from John Albanese in New Jersey in 1957. It represents a fine and historically significant example of pyrargyrite from a classic locality.
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