I was wondering how many copies does an album need to sell to reach : Gold, Platinum, & Diamond in the USA?

Is this right?

Gold: 500,000
Platinum: 1,000,000
Diamond: 10,000,000

I also found these figures for Japan as well:
Gold: 100,000
Platinum: 250,000
Diamond: 1,000,000

I just need someone to confirm these figures. Thanks