Gold is used in many different applications. Roughly half is used for jewelry, 40% in investments, and roughly 10% in industry. Gold is used in all high end electronics and is considered an excellent conductor. It is also non-corrosive, ductile, malleable, reflects infrared waves, reflects electromagnetic radiation, heat shielding. You can bet the device you are using right now has gold in it.
You mean they've created a university to tell the difference between "their" diamonds and others. Because you know the next thing they're gonna start saying is that if you don't buy their diamonds you're buying "fake" diamonds. Oh, as a mineral the only difference in a "fake" diamond and a natural is the time and expense it takes to create it.
"Fake": Short time & Some cost