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Gem Star Online Slot by Amatic

Gem Star
Gem Star
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Updated: 22.07.2025
Reviewed by: Joe Booth

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In this review
  1. Slot details
  2. Theme
  3. Blast Off!
  4. Star Bright, I Wish Tonight…
  5. Where to play
General information about Gem Star slot

General information about Gem Star slot

Rating by Joe Booth:
8.6
Amatic
Write a review +25 SJ points
  • Release Date:
    04.04.2017
  • Volatility:
    Medium
  • RTP:
    96.0%
  • Multiplier:
    No
  • Max. win:
    5,000x
  • Bonus game:
    No
  • Free spins:
    No
  • Scatter Symbol:
    No
  • Wild symbol:
    Yes
  • Symbol Stacked:
    Yes
  • Jackpot Game:
    No
  • Slot lines:
    100
  • Slot reels:
    5
  • Layout:
    5-3
  • Stakes range (€/£/$):
    10 to 1,000
  • Slot Theme:
    Space
  • Technology:
    JS, HTML5, Flash
More infoLess info

Licensed and tested by

  • MGA

Fancy taking a trip to outer space and winning big in the process? Well then, this intergalactic-themed online slot game from Amatic is precisely what you need! An odd combination to be sure (but a winning one!), with fruits, precious gems, and space travel! Moving on to the symbols, there is a red lucky 7 which orbits a planet, a colorful Wild Star, a Purple Bar Sign, A Ruby, Amber, Emerald, Amethyst, and Sapphire. Sadly, there is no galactic soundtrack to congratulate a winning combo, just some twinkling sound effects instead. As for the background, it makes you feel like you’re in deep space!

There are more than enough exciting features in this slot game, like the 100 paylines, re-spins, and wild symbols. The multicolored Wild of this game, The Star, can stand in for all other symbols. This is in order to create more potential winning combos for you! And whenever three of these symbols appear together, the Re-Spin Feature grants you one re-spin! During this spin, the Wild Star reel holds in position.

And even better, this special feature is re-triggerable from inside the round. This means that if the player spins more Wilds, they could activate even more Re-Spins! However, if you hit three Stars on all 5 reels, then this feature ends. A rather simple, yet colorful game, with an interesting combo of themes. And this is sure to appeal to any space fan looking to win some cash!

Gameplay

7.6 
Gameplay

Mobile compatibility

Mobile compatibility

Blast Off!

9.6 

But before you go on your intergalactic adventure, you need to take a good look at the betting options and select your stake. Like we mentioned, this game offers as many as 100 paylines, which means plenty of potential wins as well! Moreover, these paylines are not fixed, which means the player can select how few or how many they would like to play, in increments of 10. The player may also press the bet button (which is at the bottom of the screen) and change their bet per line. You can move from 1-50 credits per line. Which, naturally, means an overall bet per spin ranging from merely 10 credits to 1,000 credits!

Having said that, you should be aware that it isn’t exactly easy to change your bet per spin. This is because there isn’t a ‘minus button’ which you can use to take your bet down. So, if you want to lower your bet, you will first need to go all the way up to the highest one. This is until you once again access the lowest one. Careful not to overshoot, as this just means you will have to repeat the whole process all over again! The bad design, in this case, makes changing your bet a troublesome task indeed.

But you shouldn’t let that deter you from trying this Amatic slot game. Perhaps the payouts can convince you better than us, as they are pretty decent indeed. The highest-paying symbol, which is the red 7, can pay 25,000 credits for 5 matching symbols (when playing max bet). Next, we have the BAR sign, which can award the player as much as 12,500 credits.

Once again, this would be for 5 matching symbols at max bet. The Amber and Ruby gems aren’t exactly worthless either, as either one can award you up to 10,000 credits. And, you guessed it, you need to spin 5 of these symbols together while at max bet. While no less shiny or beautiful to look at, the Amethyst and Sapphire gems can pay less. Or, to be more precise, up to 5,000 credits. This, for 5 symbols at max bet, you get the drill by now.

Overall Rating

8.6

While not exactly a ‘star’ among slot games, it certainly holds potential, what with some decent payouts, and its odd mix of themes. You’ll just have to climb aboard this space journey and make up your own mind on whether it was worth it or not. 

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Joe Booth
Joe Booth
Expert in: News, Blog, Slot reviews, Payments
Joe is an expert online casino player, who knows all the tricks and tips on how to get to the most massive wins. He is also an experienced online casino games reviewer, with hundreds of written articles behind him, on all kinds of online casino games. He makes sure to play them, see how they work, and then gives his honest expert opinion about them to other players, our readers. 

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Nikita Lukanenoks
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