CERUSSITE WITH WULFENITE

Nakhlak Mine (Madan-e Nakhlak), Anarak District, Nain County, Isfahan Province, Iran
7 x 5 x 4 cm
$1,800.00
$1,800.00
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 Contemporary finds in Iran have produced some of the finest extant samples of reticulated cerussite worldwide. Even then, one often finds these specimens as smaller individuals without matrix. This here is a rich, small cabinet cluster on matrix that shows off the classic 'snowflake' growth from multiple different angles. To top this all off, there are numerous bright orange and well crystallized wulfenites on all sides!

 

More info:

The Nakhlak deposit exhibits a complex paragenetic sequence within Upper Triassic carbonate-hosted Pb-Mo mineralization, where primary sulfide alteration produced spectacular associations of cerussite and wulfenite. Early-stage galena underwent extensive oxidation, resulting in cerussite formation as prismatic to tabular crystals reaching 4 cm, while contemporaneous wulfenite crystallization produced characteristic dipyramidal and tabular crystals displaying distinctive orange to yellow coloration. The mineral assemblage suggests formation under oxidizing conditions through interaction of meteoric waters with primary sulfides, where mobilized Pb and Mo combined with carbonate and molybdate ions respectively. The presence of rhythmic growth zonation in wulfenite crystals indicates fluctuating fluid chemistry during precipitation, while the preservation of original galena textures in cerussite pseudomorphs demonstrates the in-situ nature of the oxidation processes, making Nakhlak a classic example of supergene enrichment in carbonate-hosted ore deposits.