How much is each ton of aluminium ingot and stainless steel ingot?
If the condition permits, put the gold on the fire, if has not changed color for a period of time, is really, has changed the color is false!
The malleability of gold is very strong and, to put it simply, is very soft! There should be a slight print of the bite! That's why ancient people like to bite gold!
The density of gold is relatively large, but it still feels a little bit in the hands;
