Lotto Wheel

The Roulette fortune wheel is an event that happens on a regular basis. One spin costs 500 diamonds and you may spin once every time a new wheel comes up. Most wheels are available for 2 days. Click this event icon on your screen:

Spins
If you recharge, you get more spins and by this get a chance at hitting the better rewards. One additional spin for recharging: This would allow you 10 spins in total.
 * 60 diamonds
 * 120 diamonds
 * 300 diamonds
 * 500 diamonds
 * 800 diamonds
 * 1000 diamonds
 * 2000 diamonds
 * 4000 diamonds
 * 8000 diamonds

Items
The different items you can win in the Roulette lottery are:
 * Diamonds
 * Strike Cards
 * Random items + Ashachu
 * (I don't remember more, please help)