Pragmatic Play's 8x8 cluster-pays gem game with tumbling reels, spin modifiers and a progressive Gold Fever bonus round. RTP is 96.55% with high volatility, so wins land less often but bigger.

Cluster wins instead of paylines. Gems Bonanza plays on an 8 by 8 grid of coloured gems set in an Aztec temple theme. Wins form when five or more gems of the same colour connect horizontally or vertically in a cluster, with no paylines involved. After each win, the matched gems vanish and new ones tumble down to fill the spaces, potentially creating more wins on the same spin. This cascading mechanic can keep a single spin running until no more clusters form.
Who should play this slot? High volatility means wins land less often but can be significantly larger when they do arrive. Gems Bonanza suits players who can ride longer dry spells between wins and enjoy the prospect of bigger payouts. You can bet from NZ$0.20 to NZ$240, so it works for both cautious stakers and those backing larger amounts. The size and frequency of wins make this a game for players with patience and a solid bankroll.
What keeps a spin going? The tumble feature defines how a round flows. Each time a cluster wins during a spin, those gems clear away and fresh ones drop down from above, often creating new matches instantly. Random coloured marks can land on the grid after a win, triggering one of five spin modifiers that add extra wilds, create colossal symbols or expand clusters, all without ending the spin. This keeps the action rolling as long as cascades keep connecting.
See MoreEvery slot figure explained so you know what to expect before playing
Each round starts with your bet choice and ends when wins stop cascading and your balance updates.
These payouts show what you receive at a NZ$0.20 bet. Larger clusters of the same symbol return more.
Gems Bonanza Gold Fever multipliers. Gold Fever is a five-level bonus round triggered when you collect 114 winning symbols in a single base spin, or bought for NZ$500. Each level plays all five spin modifiers in the same order: Nuclear, Wild Gem, Squares, Colossal Symbol, and Lucky Wilds. Your win multiplier rises through each level, reaching 10x at level five.
How cluster wins reshape your grid. On the base game grid, winning clusters of five or more connected gems trigger a tumble that refills the grid from above. Colored marks appear randomly on the grid during wins, and each mark can activate one of five spin modifiers after a winning spin lands on that spot.
Gems Bonanza keeps its bonus timing secret. The Gold Fever bonus round arrives through random symbol collection or purchased directly. No player can know when the next bonus will trigger during base game play, even with perfect information about the game.
Today's result differs from the long-term average. Over thousands of sessions, Gems Bonanza returns 96.55% of all stakes on average. Your next session might end at a massive win or a quick loss regardless of this figure, because each spin's outcome is independent and random.
Can I hit the maximum win? The game's maximum win exists as a ceiling calculated from the NZ$240 maximum bet and highest possible multiplier combination. Landing this exact ceiling happens so rarely that planning a session around reaching it sets an unrealistic expectation.
Spin free to see how the grid, tumble and bonus collection work before you stake.
Land Gold Fever without waiting for symbol collection: pay NZ$500 at this stake level to trigger the bonus round instantly and spin through all five multiplier levels.
RTP is a long-run average calculated over a very large number of spins. The figure shown here applies to the standard game across all bet sizes at Supabet Casino.
You'll know the RTP, volatility, betting range, bonus cost and how demo play works.
Gems Bonanza budget first. Decide what you can afford to lose on Gems Bonanza before you start. Set that amount as your session budget and stick to it, whatever happens on the grid.
Exit with a plan. Choose when you will stop playing, whether you are ahead or behind. A big win can feel like a reason to keep spinning, but it is the right time to pause.
Limits you control. Use deposit limits and loss limits on your account to enforce your choices. These tools work while you play, not after.
When the fun ends? If Gems Bonanza stops being fun or you feel out of control, take a break or use self-exclusion. The Gambling Helpline New Zealand is there if you need support.
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