Gem Machine Slot Review – RTP, Demo & Real Money Play

Read our Gem Machine slot review to discover the free spins and jackpots available on this gemstone-themed slot created by Bally. The bet range is fairly wide from 0.05 to 150 per spin and there is a potential maximum win of 250,000. The Gem Machine RTP is high at 97% with a medium volatility rate. You can play for free through our demo version or take a chance on real money at one of our recommended online casino sites.

Jewelled Bally Slot
Wager £10 Get £30 + 100 Free Spins
Full T&Cs apply. 18+ Opt in. Wager £10 on selected games within 7 days of registering. Get 3x £10 bonuses, selected games, up to 40x wagering to withdraw max £750. 100 free spins on selected games, no wagering. Bonuses expire in 7 days. Card payments only. Click for T&Cs
Slot Rating 4.50/5
Slot Gem Machine
RTP 97.00%
Software Bally
Max Bet 150
Free Spins Yes
Jackpot Yes
Paylines 5 Reels, 243 Paylines
Similar Slots Danger High Voltage, Reactoonz
Play at
Bonus Wager £10 Get £30 + 100 Free Spins
Payments Neosurf, Apple Pay
Release Date 20/01/2019

Gem Machine Slot by Bally

Play Gem Machine!
Last Updated on 20 Sep 2022 by Keira Miller

Gem Machine Slot Review Summary

Gem Machine is an online slot by Bally with 97% RTP. It has 243 paylines on 5 reels and it offers free spins and jackpot prizes. Gem Machine is available as a free demo or for real money with 150 max bet.

Best Gem Machine Sites for 2023

  1. BetVictor (Best for Playing Gem Machine for Fun)
  2. PlayOJO (Best for Playing Bally Slot Games in General)
  3. Ladbrokes (Best for Playing Gem Machine On Mobile)
  4. Vegas Baby (Best for Playing Gem Machine Overall)
  5. Bwin (Best Variety of Bally Games to Play)

Top Gem Machine Online Casinos to Play for Real Money

Top Bally CasinosWelcome BonusFree SpinsAll GamesPayoutRatingSecure Link
Wager £10 Get £30 + 100 Free Spins100214297.25%
5.00 ★ out of 5
betvictor.comFull T&Cs apply. 18+ Opt in. Wager £10 on selected games within 7 days of registering. Get 3x £10 bonuses, selected games, up to 40x wagering to withdraw max £750. 100 free spins on selected games, no wagering. Bonuses expire in 7 days. Card payments only. Click for T&Cs
50 Free Spins On First Deposit 50238596.92%
4.95 ★ out of 5
playojo.comFull T&Cs apply. 18+. First deposit only. 50 Free Spins on the Book of Dead slot. Min deposit £10. Excl. new players in N.I. Each Free Spin valued at 10p. OJO’s Rewards and Game Play policy applies.
£50 Welcome Bonus0221196.11%
4.90 ★ out of 5 Full T&Cs apply. 18+. New Casino players only. Deposit required. Bet £10+ on qualifying games. 40x wager reqs (bonus only) on selected games. Accept Bonus within 14 days. Bonus valid for 30 days. Certain deposit types excluded. Player restrictions apply.
£750 Welcome Offer057396.00%
4.80 ★ out of 5 Full Bonus Terms and Conditions. New customers only. Opt-in required. 1st deposit bonus 100% up to £200. 2nd deposit bonus 25% up to £200, 3rd deposit bonus 25% up to £200, 4th deposit bonus 25% up to £150. Min deposit £10. 40x wagering, 30 days to complete wagering, game weighting and game restrictions apply. Max Bet with bonus funds is £5. Max withdrawal from bonus funds is £2000. Neteller and Skrill excluded. Eligibility restrictions apply, cash balance can be withdrawn at any time.
100 Free Spins Welcome Bonus 100239195.91%
4.75 ★ out of 5
casino.bwin.comFull T&Cs apply. 18+. Invite only. Valid 17.09-30.09. Max 1 prize per player per day. Prizes vary & claim in 24 hours. Wagering applies.

Gem Machine Demo – Play for Free

We understand that you may be a little hesitant to part with your hard-earned cash, so we have a solution. Play Gem Machine online slot for free with our demo version below. This way you can practise the game, learn the rules, enjoy the features, all with no risk to your budget.

Free Demo of the Gem Machine Slot
Instant play

Once you’ve mastered the Gem Machine slot through free play, we reckon you’ll be ready to sign-up at one of the recommended real money Gem Machine casinos to experience it for real. Our top pick casinos are all licensed and regulated, plus they offer great bonuses and promotions for you to take advantage of.

Gem Machine Reels, Paylines & Theme

The Gem Machine slot machine is a jewel-themed slot whereby the player chooses how many reels they’d like to play with from 1 to 5. As there are 5 jackpot prizes and these only appear on specific reels, it’s advised to consider your reels carefully.

It is best to play with all five reels if you can and stakes start as low as 0.05 for one reel to 0.25 minimum bet for five reels. You will find three gemstones coloured green, blue and yellow, one free spins symbol and five jackpot labelled symbols.

Each gemstone awards one of three multipliers dependent on how many land on the reels (up to three). The gems will already have the award multiplied by the total bet per reel and show this on their symbol as it lands on the reels. The win amount is instantly awarded, this is the same for when a jackpot gem lands.

Gem Machine RTP, Symbols & Payouts

Gem Machine slot’s RTP is 97% which is a high theoretical return across many plays, when spinning with all 5 reels. When playing with 4 reels it drops to 96.50%, 3 reels 96%, 2 reels 95.50% and 1 reel 95%. The slot volatility is regarded as medium, which theoretically predicts medium pot sizes at a steady pace.

The highest paying gemstone is the yellow, which pays 1,000x bet per reel for landing 3, the blue pay 50x and the green 3x. Landing a Jackpot symbol can award you 3,000 (Mini), 6,000 (Minor), 30,000 (Major), 60,000 (Mega), 150,000 (Grand) on a maximum bet.

The Paytable of Gem Machine Online Slot
  • Adjusted Reels
  • High RTP
  • Free Spins
  • Progressive Jackpots
  • High Paying Symbols
  • Fun Theme
  • No Bonus Rounds
  • Adjusted RTP

The bet range on the Gem Machine online slot is fairly wide, with very low stakes of 0.05 per spin up to 150 higher stakes. The maximum potential win is capped at 250,000 credits, and there are 5 progressive jackpots to play for, Mini, Minor, Major, Mega and Grand.

Free Spins and Progressive Jackpots

Landing a Free Spins symbol will award you either 1, 3 or 5 free spins, the number of spins is shown on the symbol when it lands. Landing a free spins symbol during the feature will award a further number of free spins between 1 and 5, which will be added to the current total.

Land one of the five Jackpot symbols, Mini, Minor, Major, Mega, Grand, to receive the award instantly. The jackpots are progressive as the amount awarded will increase or decrease depending on the current bet per reel. Jackpot symbols will not land on the reels during the Free Spins feature.

Gem Machine Mobile

Gem Machine online slot is available to play through mobile your device. The game is optimised to adapt to any size screen, whether it be tablet or smartphone, with no compromise on the HD graphics, sound effects or smooth gameplay. A secure internet connection will help to avoid any unwanted disruption of play.

Here is the best Gem Machine mobile casino:

Wager £10 Get £30 + 100 Free Spins
  • Generous Welcome Bonus
  • Optimised Mobile Platform
  • Multiple Payment Methods
Full T&Cs apply. 18+ Opt in. Wager £10 on selected games within 7 days of registering. Get 3x £10 bonuses, selected games, up to 40x wagering to withdraw max £750. 100 free spins on selected games, no wagering. Bonuses expire in 7 days. Card payments only. Click for T&Cs

Most of the top online casinos provide fully optimised mobile platforms as mobile gaming is a sign of the times, and casinos wish to capitalise on the number of players visiting their site. Often there is no need to download a dedicated app as instant play is available directly from your web browser.

Gem Machine Reviewer Opinion

When trying out the game for our Gem Machine slot review, I was interested to discover the buy-a-reel feature. From spinning the reels and looking at the RTP fluctuation, though, I would advise for the full potential of this game, it would be ideal if you can play on all five reels.

I enjoyed the pace of the Gem Machine slot and found it lived up to the medium volatility nicely. However, I still felt it lacked that excitement of watching the reels fill up with symbols as all you see is blank reels and I missed the immersive play of bonus rounds and features.

Slots Like Gem Machine – Similar Games

For a more immersive experience, why not have a look at other slots the best slot sites are offering, like IGT’s Cleopatra with its free spins and multiplying wilds, Barcrest’s Rainbow Riches with its multiple bonus rounds or Electric Elephant’s Space Spins with its expanding wilds and free spins.

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Gem Machine slot has great appeal with its instant prizes, free spins and multiple jackpots worth up to 150,000. The betting range is wide and there is a maximum win potential of 250,000. Try it out at Vegas Baby casino and enjoy the 97% high RTP rate.

Frequently Asked Questions

We’ve come to the end of our Gem Machine slot review, and trust you found it a great read! Don’t forget, you can spin on our free demo version as many times as you like before trying the real money version. We’ve listed some of the more frequently asked questions below for you to browse through:

✅ Where can I play Gem Machine?

You can play the Gem Machine slot at many of the top online casinos. We've provided a list of our top picks for you to look through. You will find they offer great bonuses, top software and game choices, multiple payment methods and are all licensed and regulated.

❓ What is the Gem Machine RTP rate?

The Gem Machine slot RTP rate is 97% when playing with all five reels, this does fluctuate dependent on the number of reels in play. The Return To Player is a theoretical percentage indicating the potential payout to a player over an extended time frame.

🎁 Does Gem Machine come with a special bonus round?

No, Gem Machine doesn't come with any special bonus rounds. It does offer multiple jackpots and free spins but these are awarded from the game screen instantly. You can find all the best online slots bonuses here on our website.

⭐ What are the best Gem Machine casinos?

The best casino sites for playing Gem Machine slot for real money are those which offer additional features also such as promotions, plenty of game choice from top software developers, free play slots, mobile compatibility, generous welcome bonus, loyalty programs.

💻 What is the Gem Machine software developer?

The software developer responsible for creating the Gem Machine online slot is Bally. Established in 1932 and based in Enterprise, Nevada, Bally are a slot machine manufacturer and provider for other gambling-related technology. They are owned by the great software giant SG Interactive.

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