"Casino whales are the big money gamblers that spend huge amounts of cash on a single bet and are often found in Las Vegas casinos and online casinos."- casinowhale dot net
2nd result from Google search 'whale casino'.
And it was meant as a joke.
@ tu2n: My sentence was only partly ment as a joke, it was morely derived from the statement "diamonds are a girls best friend" and an alliteration of gems and girls, so I didn't understand your reaction, neither had the idea to google those terms on plus.
Grassland gems > plains hill gold.
Depends on the Food. With 2 times wet-corn, you'll beg for Gold instead of Gems.
Again, depends. Whipping is limited by Happiness, and in a scenario where the capital would really have 2 times Food and wouldn't share it, Gold gives more production with less risk of running into Unhappiness. 2 * wet Corn + Gems is basically uncontrollable and such a city would always run into unhappiness because it'd just grow too fast.