PURE gold

When any metal is shined to 24K, they are purified to gold. Yeah, I know you wanna take your screen at the picture that the creator took, but it is worth not to do it, I mean, go on, sell a Kidney, or a Heart. I am joking, you need these. But how? Tip: use some copper. Dry it, wet it, all the way, until it kinda gets yellow. This may not be true, but copper also uses carats. 
== Big rush ==
The gold rush is a famous mine when a bajillion miners found a lot of 24k in a cave mine, it was an R.A.T., and many people had to get it with cheating.
=== How to cheat? ===
Big idea. Experiment. Pretty easily fooled, actually some cheaters in the rush take rocks, use a plate that only gets rid of water, pour the water, and then leaves the rock behind. Then, as it shines, it becomes gold. YOU SAVED IT!