There are an assortment of ways to pay for your Gems. The bigger the Gem offer you select, the better the deal, overall. Maria already has a lot of Gems, but if she wants more she can click the Gem button (where her Gem total is displayed.) To purchase Gems you must select the Gem tab just under where Coin total is displayed. You can buy them, for real money, or you can earn them through rewards like the Treasure Box. Gems are the premium currency in Vegas World, and while you can't wager with them, they're what you need to get more Coins as well as some of the fancier items you can only purchase with Gems.
