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Arsenic Weight in Pyrite Grain

By Communications and Publishing
Image shows a scan of a grain of pyrite rimmed with stibnite, with varying levels of arsenic shown in a color gradient.
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Detailed Description

Image shows a scan of a grain of pyrite rimmed with stibnite, with varying levels of arsenic shown in a color gradient. Image produced by Erin Marsh, USGS. 

Sources/Usage

Public Domain.