Gems Bonanza Slot Review

Expert Rating: 4 out of 5
Review by Chris Taylor
Last update 9th May 2022
Review by Chris Taylor
Last update 9th May 2022

The Gems Bonanza slot is a super volatile jewel-themed game from Pragmatic Play. The action takes place on an 8×8 reel grid and uses a Cluster Pays mechanic. Special coloured markings can appear behind symbols which can in turn deliver an assortment of modifiers. These include transforming wilds, 2×2 symbol blocks, a whole grid clearance, colossal symbols or up to 15 added wilds. Collect winning symbols in a meter. Reach the threshold and you’ll trigger the Gold Fever Progressive feature where all the colour modifiers play out in turn. Look out too for multipliers which can get payouts racing. With 10,000 x bet max wins and a high 96.55% RTP rate, find out more in our Gems Bonanza review.

Gems Bonanza Max Win
10,000 x bet
Pragmatic Play
Type of Slot
Grid Slot
Cluster Pays
Stakes Range
20p to £100
Bonus Features
Yes (7)
Free Spins/Multiplier
Max Win
10,000 x
Very High

Gems Bonanza Demo

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Gems Bonanza Slot RTP, Details & Wager Limits

Reels/Paylines: 8×8 grid + Cluster Pays

Stakes Range: 20p to £100 per spin

RTP: 96.55%

Max Win: 10,000 x stake per spin

The Gems Bonanza slot is played on an 8×8 grid. Form a winning combination by landing a cluster of 5 or more matching symbols or wilds. The more matching symbols, the bigger the payout. You can land winners from multiple symbols from the same tumble.

Stakes in Gems Bonanza range from between 20p and £100 per spin. Use the + and – buttons in the bottom right-hand corner of the screen to adjust. You can run between 10 and 1,000 autospins if required. There are also options for quick and turbo spin mode if you want to ramp up the pace. Both Autoplay and the quick/turbo modes are not available in the UK.

The Gems Bonanza RTP is 96.55% which is well above the 96% slots average. The volatility is very high (5/5) meaning big wins will be hard to come by. The chance to hit big wins in a short time span is higher on the flip side.

In terms of payouts, it can deliver some big potential rewards though. The maximum payout is 10,000 x your total bet per spin. This can be won during the Gold Fever Progressive feature (more details below).

Theme – follow the map to lost treasure

Theme: Aztec

High Value Symbol: Red Jewel

Compatibility: Mobile, Tablet, Desktop

Gems Bonanza slot base game

With an Aztec theme, shimmering jewels dominate the reels in the Gems Bonanza slot. It conjures up images of an Indiana Jones adventure. In the backdrop, a mysterious pyramid building appears as well a statue that fires off the modifiers when they strike. The bright visuals here are sharp and clear. That’s important in a slot that has so many moving parts. There’s a panpipe-heavy backing track playing in the background.

On the reels are 7 brightly coloured gems. The most rewarding symbol is the red jewel. This pays 1,000 x your total stake if you land a cluster of 25 or more matching symbols.

There’s also a wild symbol that replaces all symbols when it appears in the Wild Gem and Lucky Wild modifiers. There is no scatter or bonus symbol as you’ll discover below.

Symbol Payouts/Info
gems-bonanza-slot-blue-gemstone-symbolBlue Gemstone 25= pays 50 x stake
gems-bonanza-slot-pink-gemstone-symbolPink Gemstone 25= pays 75 x stake
gems-bonanza-slot-yellow-symbolYellow Gemstone 25= pays 100 x stake
gems-bonanza-slot-turquoise-gemstone-symbolTurquoise Gemstone 25= pays 150 x stake
gems-bonanza-slot-green-gemstone-symbolGreen Gemstone 25= pays 300 x stake
gems-bonanza-slot-purple-gemstone-symbolPurple Gemstone 25= pays 500 x stake
gems-bonanza-slot-red-gemstone-symbolRed Gemstone 25= pays 1,000 x stake
gems-bonanza-slot-wild-symbolWild Substitutes for all symbols + only appears in Wild Gem + Lucky Wilds features

Gems Bonanza Mobile


You can play Gems Bonanza on all devices. This includes mobiles, laptops, PCs and tablets. Despite the 8×8 game grid being much larger than a standard slot, the crystal-clear imagery is very easy on the eye. The smartphone/mobile version works very nicely indeed.

Gems Bonanza Bonus Features

In the Gems Bonanza slot, the gameplay is a little unusual. There are 8 bonus features in total. There’s the grid setup and tumbling reels for starters. Coloured markers can in turn can bring a host of modifiers into play. Then there’s the Gold Fever Feature where the modifiers play out in turn. Work through the levels there to activate multipliers. I’ll start with the game grid.

Tumble feature

The game is played using a Tumble feature. After a winning combination is created, all the successful symbols are removed from the reels and new symbols drop in and replace them. A new payout calculation then follows. If you land a new winning combination, the process is repeated. The tumbles keep on coming until there’s no new winner on display. This is pretty much a standard feature of a grid slot.

Spin features

On any base game spin, you could see a coloured marking appear behind a symbol. If that symbol becomes part of a winning combination, the coloured mark triggers a modifier. If that creates a winner, a standard tumble then follows. Again, these continue until there’s no new winner. The markings deliver the following extras. It’s possible to land multiple modifiers on the same spin. The modifiers/features play out in sequence.

Feature Mark Description
Nuclear Blue All the symbols on the grid are removed + a new set of symbols replace them
Wild Gem Pink After the round of tumbles is complete, all examples 1 symbol turn into wilds
Squares Brown A 2×2 symbol block is added to a random position on the grid
Colossal Red A 3×3, 4×4 or even 5×5 symbol block is added to the grid
Lucky Wilds Green Between 5-15 wild symbols are added to the grid with a new tumble to follow

Gold Fever Progressive feature

Gems Bonanza slot Gold Fever Progressive feature

Each time you land a winning cluster from a single set of tumbles, the symbols are added to a meter to the left of the reels. Collect 114 symbols from a single spin and a set of tumbles to trigger the Gold Fever Progressive feature.

You’ll then get a ‘spin’ where all the modifiers play out in succession. Boosting your chances here is a 2x multiplier. Once again, winning symbols are collected in a meter. Collect enough symbols to fill the meter and you’ll advance to the next level where even bigger multipliers are in play:

Level Symbols Collected Multiplier
1 114 2x
2 116 4x
3 120 6x
4 125 8x
5 132 10x

The meter reverts to zero at the start of a new spin. Finally, in some territories, you’ll have the option to buy the Gold Fever Progressive feature for a fee of 100 x your total stake. This is known as the Gold Fever feature. The Collect numbers are slightly different to standard play but otherwise, the feature is the same.

Gems Bonanza Review Summary – exciting + high win potential cluster pays slot

Theme & Symbols

Sounds & Music

Bonus Features

RTP (96.55%)

Max Win (10,000 x)


I was very impressed by what I found in the Gems Bonanza slot. The sound and visuals are terrific, creating loads of atmosphere. The modifiers keep the cluster pays game engine motoring along too.

The action here can really rev up during the Gold Fever Progressive feature, especially if you collect enough symbols to advance through the levels and bring the larger multipliers into play. It reminds me of various grid slots from Play ‘n GO in the way the features come into play (like Miner Donkey Trouble and Reactoonz 2).

The best of the Spin features is the Lucky Wilds feature as landing up to 15 wilds can easily give you 114 or more winning symbols. This will in turn bring other levels and their subsequent multipliers into action. The hope is that you get a big multiplier with all the Spin features playing out in sequence.

With 10,000 x bet max wins, Gems Bonanza is a potentially lucrative grid slot that benefits from a higher than average RTP rate. It’s well designed, has lots of extras but is high variance.

Like grid/cluster pays slots? Jammin’ Jars from Push Gaming and Sweet Bonanza by Pragmatic Play are the 2 most popular choices.

  • 10,000 x bet top payouts
  • High 96.55% RTP rate
  • Various bonus features
  • No free spins
  • Similar features in other grid slots

Gems Bonanza FAQs

What is the Gems Bonanza RTP?

The Gems Bonanza RTP rate is 96.55% which is quite a bit higher than the 96% average. It is highly volatile though so expect small wins most of the time.

What is the Gems Bonanza max win?

Gems Bonanza can pack a big payout punch too with awards of up to 10,000 x your total stake per spin possible. To win big, you need to bring multipliers up to 10x into play from the Gold Fever Progressive feature.

How does the Gold Fever Progressive feature work?

The Gold Fever Progressive feature sees all 5 spin features play out in succession. Collect enough winning symbols and you’ll advance to the next levels where multipliers of up to 10x can really get things moving.

How do the Spin features work?

Coloured markings behind symbols trigger the 5 Spin features. Each different, you can land multiple features on the same spin. They include symbol removals, wild transformations, 2×2 symbol blocks, colossal symbol blocks up to 5×5 and up to 15 wilds.