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 S2 Refine S2 The Refine S2 is a subcompact CUV produced by JAC Motors under the Refine sub-brand. It was positioned between the Refine S2 Mini and the Refine S3 compact CUV. The Refine S2 was launched on the 2015 Shanghai Auto Show in April 2015, and was later launched in the Chinese market in August 2015. Pricing of the Refine S2 was revealed at the market launch with prices ranging from 58,800 yuan to 75,800 yuan. The JAC iEV7S is essentially the electric version of the Refine S2. It costs 119,500 yuan after subsidies, and it is powered by an