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Tedhadleyite: Hg++Hg+10O4I2(Cl1.16Br0.84)2
Comments: Grain of tedhadleyite between crossed polars, showing ubiquitous red internal reflections. (CanMin, v40:909). Location: Small prospect pit near the long abandoned Clear Creek mercury mine, New Idria district, San Benito County, California, USA. Scale: Grain Size 0.3 mm. © Canadian Mineralogist