Fig. 10 Photomicrograph of lean ore, Hendricks mine, with incomplete crystals 



of pyrite developed in chlorite, bleached mica, kaolinized feldspar (in part plagio- 



clase) and quartz. A few cracks shown in the pyrite were made in grinding the 

 section. (Magnified 27.5 diameters) 



.;. ..V^, 





Fig. 12 Photomicrograph of pyritiferous pegmatite. Styles mine, with pyrite, 

 chlorite and sericite developed along cracks in feldspar. (Magnified 83.5 diameters) 



