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
Past in Different Ways to Michael Kiske, Past In Different Ways "on one hand shows that I don't reject my past just because I'm a different person today, and on the other hand it can maybe give people who were part of that past a different view at those songs. It's my music, I can still identify myself with its spirit...I generally brought each song down to its basics, threw out useless weight and sometimes changed the key to make them sound better as acoustics; and I was surprised how well they worked like that". It was released on 9 May 2008 with cover