116K views · 1.9K reactions | There are two types of clay occurring in Arkansas quartz pockets: black manganese oxide and red iron oxide. Open pockets commonly have black manganese clay, and this piece is typical of the Hamilton Hill Mine, which usually doesn't have red iron oxide clay because it's mostly in shale. Other deposits, like the Zigras Mine, are in red iron oxide rich quartzitic sandstone. | Avant Mining LLC | Facebook

Chief Chisunka concerned with Manganese mining firms employing Children Zanis- Luapula Chief's Council Chairperson, Chief CHISUNKA, has called on investors operating in the province to adhere to national labour laws. Chief CHISUNKA expressed concern that some investors in the Manganese sector are violating laws by employing underage children and failing to provide protective clothing for workers. | ZNBC Today