Talk:Gemstone Island/@comment-5786363-20130703035035

Look, they aren't going to price the gemstone habitats based on a straight ROI of a Jade Dragon, or even one of the monthly dragons earning at 1G/Week.

That's not even the full ROI determination, you have the ability to have more dragons out, to display either all the types, or lots of your favorites.

It's also worth pointing out that the ROI doesn't even exist in a vacuum of that one dragon. You can generate the 75 needed gems in less than a week at peak capacity. You're sinking somewhere around 6 days worth of gems into both upgrades - and that's the basis of the pricing. Not ROI but Generation of currency overall.