Barite
<p style="text-align: justify;">LOCALITY: The Olympic Dam Mine, near Roxby Downs, South Australia (state) 
<br /><br />3" across
<br /><br />Olympic Dam is mined for copper, uranium, silver and gold. It is a highly automatic mine. Hence, human contact with ore is very limited at best. This is largely why mineral specimens from Olympic Dam are very rare. This one was probably salvaged during the 1990's. 
<br /><br />Photo by Matthew Webb of Melbourne, Victoria, Australia</p>
description: <p style="text-align: justify;">LOCALITY: The Olympic Dam Mine, near Roxby Downs, South Australia (state) <br /><br />3" across <br /><br />Olympic Dam is mined for copper, uranium, silver and gold. It is a highly automatic mine. Hence, human contact with ore is very limited at best. This is largely why mineral specimens from Olympic Dam are very rare. This one was probably salvaged during the 1990's. <br /><br />Photo by Matthew Webb of Melbourne, Victoria, Australia</p>
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