Ludlamite and vivianite
description: <p style="text-align: justify;">LOCALITY: Huanuni Mine, near Oruro, Bolivia</p> <p style="text-align: justify;"> </p> <p style="text-align: justify;">2 3/8" Across  <br /><br />This piece was formerly in the collections of Terry ("Skip") Szenics and Scott Rudolph. The author bought it from "Trinity Mineral Company" in early 2017. <br /><br />The author visited Huanuni in person during early 1998. It was a tin mining town dominated by a hydraulic tin concentrater. Poor miners panned the effluent from the concentrater in their endeavors to eek out a living. <br /><br />The author also viewed a group of independent miners drilling an adit into the side of the hill. Unfortunately, no cassiterite, ludlamite or vivianite had been found. Only pyrite had been encountered. <br /><br />Miners who were successful in finding cassiterite (tin oxide) would crush it with a metal cradle. The cassiterite and pyrite mixture was then heated. This led to reduction of the cassiterite to metallic tin and liberation of sulfur dioxide gas. It is one of the most toxic substances known to man. During the author's visit to Huanuni, no vivianite or ludlamite was found. <br /><br />Photo by Matthew Webb of Melbourne, Victoria, Australia</p>

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