Mexus Gold US (MXSG)

[8thaero]

Lesson 2

Intl Trade Gold is .9999 which fired can best as one in 10,000. Beats the mint quite a bit.

"The most elaborately accurate, but totally destructive, precious metal assay is fire-assay. (It may also be called by the critical cupellation step that separates precious metal from lead.) If performed on bullion (high purity precious metal alloy) to international standards, the method can be accurate on gold metal to 1 part in 10,000. If performed on ore materials using fusion followed by cupellation separation, detection may be in parts per billion. However, accuracy on ore material is typically limited to 3 to 5% of reported value. Although time consuming, the method is the accepted standard applied for valuing gold ore as well as gold and silver bullion at major refineries and gold mining companies. In the case of fire assaying of gold and platinum ores, the lengthy time required to carry out an assay generally is offset by carrying out large numbers of assays simultaneously, and a typical laboratory will be equipped with several fusion and cupellation furnaces, each capable of taking multiple samples, so that several hundred analyses per day can be carried out. The principal advantage of fire assay is that large samples can be used, and these increase the accuracy in analysing low yield ores in the <1g/T range of concentration."

https://en.wikipedia.org/wiki/Metallurgical_assay

This page was last edited on 10 September 2017, at 00:33.