Swiss gold refinery Argor Heraeus opened the doors of its site in Mendrisio, in Switzerland's Italian-speaking canton of Ticino, showing the refining process that results in shiny bars for ...

The process starts with mining, where gold-rich ores are dug out from underground or open-pit mines. Once extracted, the ore is crushed and ground to release the gold particles.

After this firing process the gold and glass had separated with the glass removing a majority of the added sand leaving behind a purified gold button at the bottom of the test crucibles.

We know that people have valued gold and silver for thousands of years, but new evidence reveals that people were using the ...

In a refinery just outside Uganda's main airport, workers slip bars of freshly refined gold into clear plastic bags sealed with a sticker of the national flag - black, yellow and red - and the ...

Swiss gold refinery Argor Heraeus opened the doors of its site in Mendrisio, in Switzerland's Italian-speaking canton of Ticino, showing the refining process that results in shiny bars for ...