Le Cetine di Cotorniano mine

Chiusdino, Siena Province, Tuscany, Italy

Le Cetine di Cotorniano is an abandoned antimony mine, closed in the 1940s. The mine is best known amongst mineral collectors for fine specimens of stibnite.

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It’s worth noting that while the mine is best known for needle-like stibnite specimens, it is a little more interesting than that geologically speaking.

The site produced nearly 90 minerals, as well as being the type locality for seven minerals – batoniite, brizziite, cetineite, dacostaite, nannoniite, onoratoite, and rosenbergite – not exactly well known minerals outside of the systematic mineral collectors field, but still.

There is a fantastic writeup of the site linked below, a PDF report on the ascuoladiopencoesione.it website.

 

Further reading

 

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