Gems Up is a really interesting slot where you win by landing winning paylines or special gem symbols that have credit values associated with them during the "Prize Fever Feature" where a certain group of symbols may transform into into symbols with credit prizes with the Gold Group the most valuable, then the Red Group and finally the Blue Group. The symbols that transform for the Blue Group are the lower-paying symbols, for the Red Group it's the gem symbols, with the exception of the diamond and for the Gold Group it's all remaining symbols including the diamond.
The Free Game Feature is triggered by landing bonus symbols on reels 2, 3 and 4 for 5 free games. You start at the Blue Level and upon retrigger are upgraded to the Red Level and upon a second retrigger, the Gold Level. During each retrigger, an additional group of symbols is transformed into credit symbols giving you a great shot at Big Wins and Progressive Jackpots, so it's all about retriggers for this one!
Progressives are won by fully landing 4 reels with credit prizes of the same color for the "Gems Jackpot" and if you are lucky to land 5 reels of credit prizes of the same color, the "Fine Gems Jackpot" is awarded, Enjoy!