I just asked on a facebook group this question and the difference in prices for some Countries is pretty big.
Is the Main Currency in this game US$ ? If so why when you convert from one Country to US $ there is such a big difference for some (Australia nd UK and European Countries seem to be effected the most) ?
Also does the platform you play on make a difference to the price of gems?
I think devs need to look into this and fix the prices so its fair for everyone.