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https://fireassay.eu/wp-content/uploads/2018/11/Assaying_of_gold_jewellery_choice_of_technique.pdf
Assaying is the technical term used for the quantitative chemical analysis of a material, or object, for one specific metal or chemical element of particular interest. It is often associated with the analysis of ores and metals; in the context of gold jewellery, assaying means the determination of the gold …
https://www.gold.org/goldhub/research/assaying-and-refining-gold-guide-gold-jewellery-producer
The gold prices used in this table and chart are supplied by FastMarkets. Where the gold price is presented in currencies other than the US dollar, it is converted into the local currency unit using the foreign exchange rate at the time (or as close to as possible).
https://www.911metallurgist.com/blog/wp-content/uploads/2016/11/How-to-Calculate-Gold-in-Fire-Assay.pdf
GOLD ASSAY(FIRE ASSAY METHOD) •STEP 1:Melting Process Put the scrapped metal part of jewellery in charcoal crucible and covered with charcoal powder. •Put the crucible in melting furnace for 3-5 minutes at the temperature of 1068-1070ºC. •Cool down the metal and make a strip using rolling mill.
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