Gold costs were about $317 per troy ounce in 2007, but these can vary widely depending on mining type and ore quality; global mine production amounted to 2,471.1 tonnes. After initial production, gold is often subsequently refined industrially by the Wohlwill process which is based on electrolysis or by the Miller process, that is chlorination in the melt. The Wohlwill process results in higher purity, but is more complex and is only applied in small-scale installations. Other methods of assaying and purifying smaller amounts of gold include parting and inquartation as well as cupellation, or refining methods based on the dissolution
Refine M6 updating the grilles, placing the Refine M6 more inline with the other JAC Refine products. Refine M6 The Refine M6 is a minivan produced by Chinese auto maker JAC under the Refine sub-brand since 2013. Despite its dimensions being smaller than the Refine M4, it is the most premium Refine MPV, sitting above the Refine M3, Refine M4, and Refine M5 making it the flagship of the Refine brand. According to the official website, pricing for the Refine M4 ranges from 239,500 to 349,500 yuan, positioning the Refine M6 above the Refine M5. The design of the Refine M6 is