The Great Gems slot game has a low-medium volatility and a very low RTP of 94.63%. While a low volatility implies that wins appear in quick succession, its low return rate negates that a bit with fewer payouts in general, as games like the Great Gems slot online have the clear edge over the player. You can therefore expect infrequent wins with smaller payouts in total. Though this might seem like the Great Gems online slot is a hard sell, its competitive gameplay makes scoring those wins all the more worth it. The lowest paying amongst the symbols are unadorned gems that are only cut but don’t include any ornamentations. Paying out higher are sapphires, jades, topazes, amethysts, and rubies cut into ornate metal frames. The most lucrative among them is the ruby, with its 4x payout for a five-of-a-kind combination. The diamond is a special wild symbol that can take the place of any missing symbols still needed to form a combination on the reels. It has the highest payout overall at 8x. Despite the challenges of the Great Gems slot machine, it does have generous features that are randomly generated, such as the senior reels. At any point in the game, the algorithm might remove seven low-paying symbols and leave only the higher-paying ones to give you more opportunities to score bigger wins. During the free spins, there is also an extender feature. This essentially turns the ruby into a special extender symbol. This feature triggers its appearance at random and also its expansion into a mega symbol, even covering up to 5x4!