Please confirm your state:

Casino offers depends on you state!

US New Jersey

Gems Bonanza Slot - Free Demo & Game Review | Oct 2021

Gems Bonanza is a cluster pays 8x8 grid slot from Pragmatic Play, and it comes with 5 different base game reel modifiers. This is a highly volatile title with an above-average 96.51% RTP, and a 10,000x potential.

Play Demo for free

I confirm, that I am over 18.

User Rating: 8.3/10 (6 votes)

Provider:Pragmatic Play
RTP 🔗: 95.54% [ i ] RTP Ranges!
Variance: HIGH
Max Win: x10000.00
Betways: Cluster pays
Release: 01.10.2020 [ i ]
SlotRank: 275
All properties >

Online Casinos in United Kingdom where you can play Gems Bonanza

We scanned 721 United Kingdom online casinos and found Gems Bonanza in 326 of them. 2 casinos put Gems Bonanza in their lobby. Average position in the casino lobbies is 150.04 (Calculated for all 721 casinos). SlotRank for Gems Bonanza for United Kingdom is 275.

Captain Spins GB

Up to 520 Bonus Spins

Ready to play for real at Captain Spins?

Claim bonus

18+. New players only. One welcome package per player. Max bonus bet £5, Min deposit £20 1st deposit: get 100 bonus spins, 2nd Deposit: get 120 bonus spins, 3rd deposit: get 140 bonus spins, 4th deposit: get 160 bonus spins. All spins are on slot game Book of Dead only. Bonus funds must be used within 30 days and bonus spins within 7 days. Max winnings from bonus spins are equivalent to the number of spins awarded. Spins winnings credited as bonus. Bonus funds separate to Cash funds, and are subject to 35x wagering and withdrawal requirements. #ad
Videoslots GB

100% up to £200 + 11WS

Ready to play for real at Videoslots?

Claim bonus

18+ | New Players Only. Min Deposit €/$/£10, Wagering Requirements: 20x. Account balance is withdrawable at any time. Upon withdrawal, any remaining bonus balance is forfeited. 7 days to activate the spins. Bonus spins expire after 4 hours. T&C Apply. #ad
Skol Casino GB

Up to £1300 + 250 FS

Ready to play for real at Skol Casino?

Claim bonus

18+. New Players only. One bonus offer per player. Min deposit £10. Max bonus bet £5. Bonus funds must be used within 30 days & bonus spins within 10 days. Spins valid on Starburst only. Offer consists of: 1st dep: 100% up to £300 & 100 spins, 2nd dep: 75% up to £300 & 75 spins, 3rd dep: 50% up to £300 & 50 spins, 4th dep: 25% up to £300 & 25 spins, 5th dep: 100% up to £100. The 100 spins triggered on your 1st dep are credited at a rate of 25 spins per day over 4 days. Bonus spins winnings credited as bonus funds & capped at £50. For the 1st dep offer, this winning cap shall be applied to each set of 25 spins. Bonus funds separate to Cash funds and subject to 35x wagering. Terms apply.
Casumo GB

100% up to £25 + 20 BS

Ready to play for real at Casumo?

Claim bonus

18+. New UK customers only. Opt-in required. 20 Bonus Spins on "Book of Dead" and 100% Deposit Bonus up to £25 on first deposit. Min deposit £10. 30x wagering requirement for Bonus Spins and 30x wagering requirement for Deposit Bonus (game weighting applies). Max £5/spin or £0.50/line or £10/round (live casino). 30 days expiry. T&C's Apply. Please gamble responsibly • • Bonus terms
Race Casino GB

100% up to £100 + 10% Cashback

Ready to play for real at Race Casino?

Claim bonus

18+. New depositors only. UK residents only. Minimum deposit £10, max bet £5 with bonus funds. 40x wagering on bonus. Excludes deposits made via Skrill, Entropay and Neteller. 100% up to £100 bonus on 1st deposit.
Casino Lab GB

100% up to £100 + 300FS

Ready to play for real at Casino Lab?

Claim bonus


All 182 casinos

Load more

Gems Bonanza slot review

Last Update: 23.08.2021. Author: SlotCatalog.

Gems Bonanza is a cluster pays 8x8 grid slot from Pragmatic Play, and it comes with 5 different base game reel modifiers. This is a highly volatile title with an above-average 96.55 % RTP, and a 10,000x potential. The 5-tier bonus round parades out all 5 reel modifiers like pearls on a string, and each new level increases the win multiplier progressively up to 10x.

You’ll see 64 shining gemstones drop down on every spin, and you need to form matching clusters with between 5 and 25+ symbols to win. The cascading wins feature makes sure to give you plenty of new opportunities on a regular basis, and the different reel modifiers will trigger quite often. This breaks up the base game grind a lot, and makes the whole experience feel less volatile than it actually is.

The pace of the game is pleasant enough, and it’s set to a soothing synth soundtrack. You can place bets between 20p and £100 per spin across all platforms and devices, and the 5 premium gemstones pay out between 50x and 1,000x for 25+ in a cluster. Wilds cannot land organically here, but you can look forward to plenty of wilds from 2 of the 5 reel modifiers. Gems Bonanza is a highly entertaining game that also packs a solid punch, without ever feeling overly brutal or “hard to get”.

Gems Bonanza
Gems Bonanza

Gems Bonanza Features

On every base game spin you’ll see up to 4 different colored spots in various configurations on the wall/map behind the symbols. If you land a winning combo on top of one or more of them, you will trigger the corresponding reel modifiers:

  • Blue spot (Nuclear modifier) – clears all symbols, and gives you a fresh new batch.
  • Pink spot (Wild Gem) – transforms all instances of a randomly chosen symbol into wilds.
  • Brown spot (Squares) – gives you identical 2x2 mega symbols randomly added to the grid.
  • Red spot (Colossal Symbols) – a 3x3, 4x4 or 5x5 mega symbol is placed randomly on the grid.
  • Green spot (Lucky Wilds) – gives you 5 to 15 wilds randomly placed on the grid.

You can win more than one modifier at the same time, and if that’s the case they play out in the order listed above.

On the right-hand side you’ll see a Gold Fever meter, and each tumble win fills the meter with liquid gold from the collected symbols. The meter resets on losing spins, and it takes 114 winning symbols to fill the meter. This triggers the Gold Fever Bonus Round.

The free spins feature has 5 levels, and you start at level 1. The multiplier starts at 2x for level 1, and you will now get all 5 reel modifiers in sequential order. You collect symbols also here, and filling the meter again upgrades you to the next level. You need to collect 116, 120, 125 and 130 symbols to get to level 2, 3, 4 and 5, respectively.

Level 2 to 5 comes with multiplier values of 4x, 6x, 8x and 10x, and all 5 modifiers play out on each new level. The bonus round is over when all 5 modifiers have played out, and you didn’t collect the symbols needed to move to the next level. If you get to level 5, the feature is finished once the 5 modifiers have played out.

Depending on your jurisdiction, you can buy the Gold Fever progressive bonus round by paying 100x your stake. It plays out the same as it would if triggered organically, but UK players cannot go for the buy option.

The 200 Spins Gems Bonanza Experience

Grid slots are usually action packed and exciting, and we very much looked forward to seeing this massive, gemstone riddled 8x8 setup in action. We actually managed to get to the second level in the bonus round, but the rumor is that getting further than that is quite difficult. Check out all the highlights from our 200 spins test session in the video below.

Gems BonanzaVideo Gems Bonanza

Review Summary

Like so many grid slots, Gems Bonanza comes with this “oddly satisfying” quality that makes you feel good inside when playing. There are plenty of base game features to keep you entertained here. However, displaying the name of each feature in bold type in front of the grid every time is a bit over the top. No need for hiccups like that to break up the otherwise nice flow.

The bonus round gives you all 5 features in a row, which is kind of neat, but getting above level 2 is not that easy. Even at that level you can still land solid payouts though, and the 10,000x potential is very solid even for a highly volatile game. There might not be anything brand new to see here. However, all the moving parts have been arranged together in a unique and effective way, which makes for a very decent grid slot experience.


  • 5 different reel modifiers
  • 5-tier bonus round where all 5 modifiers play out sequentially
  • High volatility and 10,000x max win potential


  • Hard to get passed level 2 in the bonus round

If you love Gems Bonanza you should also try:

If you like 8x8 grid slots, we have 24 in our catalog at the time of writing. You can check them all out via the link, or you can take a closer look at our hand-selected options below.

Star Clusters Megaclusters - is a Big Time Gaming innovation that plays out on a 4x4 grid. The bonus round plays out on an 8x8 grid however, and another similarity is all the bright gem symbols. What makes this game unique is the Megaclusters mechanic, and this is a high volatility title with a max win close to 24,000x your stake.

Reactoonz 2 - is the very anticipated sequel to the Play’n Go classic, and it plays out on a 7x7 grid. It comes jam packed with bonus features, and you can look forward to electric wilds, 4 Quantum meter levels and plenty more. Wins above 5,000x is possible in this highly volatile Cluster Pays engine game.

Jammin' Jars - is an 8x8 grid slot from Push Gaming, and it comes with a massive 20,000x your stake potential. It runs on a Cluster Pays engine, and you can land giant symbols randomly here, as well as upgradable jam jar multiplier wilds. There is also a bonus round to be triggered in this highly volatile and entertaining title.

Video and Image gallery

Gems Bonanza. Gems Bonanza slot
Gems Bonanza. Gems Bonanza slot
Gems Bonanza. Gems Bonanza slot
Gems Bonanza
Start Screen. Gems Bonanza slot
Start Screen. Gems Bonanza slot
Start Screen
Reel Screen. Gems Bonanza slot
Reel Screen. Gems Bonanza slot
Reel Screen
Nuclear. Gems Bonanza slot
Nuclear. Gems Bonanza slot
Colossal Symbol. Gems Bonanza slot
Colossal Symbol. Gems Bonanza slot
Colossal Symbol
Features Screen 1. Gems Bonanza slot
Features Screen 1. Gems Bonanza slot
Features Screen 1
Features Screen 2. Gems Bonanza slot
Features Screen 2. Gems Bonanza slot
Features Screen 2
Features Screen 3. Gems Bonanza slot
Features Screen 3. Gems Bonanza slot
Features Screen 3
Gold Fever 1. Gems Bonanza slot
Gold Fever 1. Gems Bonanza slot
Gold Fever 1

Comments (0)

No comments so far, login to write the first one!

Gems Bonanza Slot FAQs

❔ What is the RTP of Gems Bonanza slot?

The game’s payout percentage is 96.55 %, which is a bit above the average, though, you can get lower payback due to RTP ranges. Available RTP values are 96.55%, 95.54%, and 94.53%. Feel free to learn more about Return to Player (RTP) via this link.

❔ How volatile is Gems Bonanza?

This is a high volatility game from Pragmatic Play, but it feels less like it because of all the modifier action you get in the base game.

❔ What is the biggest win possible?

You can win up to 10,000x your stake here. This amounts to a max payout of £1,000,000 if you play with the highest possible stake of £100 per spin.

❔ How does the 5 reel modifiers work?

You trigger the modifiers by landing winning combos on colored dots on the background wall/map. Each color represents a different modifier, and you can trigger more than one at the time.

❔ Is there a free spins mode in Gems Bonanza slot?

Yes, it comes with 5 tiers, and all 5 reel modifiers play out sequentially for each tier you level up to. There is also a multiplier that starts at 2x and reaches 10x at tier 5.

❔ How many winning ways are available?

This is a Cluster Pays engine game, and you need to connect between 5 and 25+ identical symbols horizontally or vertically to win.

❔ Can I play Gems Bonanza for free?

Yes, you can try Gems Bonanza slot for free via the demo version at the top of this page (UK players must verify age first). Feel free to check out all casinos that carry this game up there too, and play with a sweet welcome offer.

Scanned Countries

United Kingdom

Sorry, Gems Bonanza is not available for this market. In total, we scanned casinos at 47 in various markets. Gems Bonanza is available in 43 countries. The markets with the highest number of casinos are: FI, GB, NO, CA

Country Scanned [i] With Game [i] In Lobby [i] SlotRank [i] Action
Finland FI 544 326 11 235 See Data
United Kingdom GB 721 326 2 275 See Data
Norway NO 447 291 16 173 See Data
Canada CA 481 279 16 108 See Data

Browse All Countries (43)

Gems Bonanza SlotRank

In November 2020 Gems Bonanza (Video Slots from Pragmatic Play) reached its highest recorded position, #25 in the UK market. View the proof of achievement on the game’s SlotRank page.

Embed the badge on your site!

Gems Bonanza Free Spins and No deposit Bonuses

Paddypower (Games)

Get 100 Bonus Spins

Ready to play for real at Paddypower (Games)?

Claim bonus

18+ New customers. Spins: 100 on registration, 100 after deposit, absolutely no wagering requirements. Welcome bonus: £10 min deposit, max bonus 100 Bonus Spins, absolutely no wagering requirements. T&C Apply #ad
Fun Casino

Get 10 Bonus Spins

Ready to play for real at Fun Casino?

Claim bonus

18+. New customers only, wagering 50x. Excluded for players depositing with Skrill or Neteller. Full T&Cs apply. . Play Responsibly. #ad
Yeti Casino

Get 23 Bonus Spins

Ready to play for real at Yeti Casino?

Claim bonus

18+. New customers only, min deposit £10, wagering 60x for refund bonus, max bet £5 with bonus funds. Free Spins bonus has x40 wagering. 23 free spins on registration (max withdrawal is £100). 100% refund bonus up to £111 + 77 spins on 1st deposit. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Ecopayz, Skrill or Neteller. Full T&Cs apply. Play Responsibly #ad
All No Deposit bonuses

ajax loader