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We evaluate slot machines based on multiple criteria, from which we make our final verdict.
Design and theme
96 %
Features and playability
95 %
RTP and volatility
96 %
Slot machine details and review Gem Blast
Gem Blast is an online slot machine from developer Endorphina, inspired by the Northern Lights and precious gemstones. The game has a 5 reel, 3 row layout with 10 paylines that allow winning combinations in both directions. The theme is based on the legend of the Aurora Borealis, with bright and colorful gemstones illuminating the reels, creating a captivating visual experience.
Every slot machine must be manufactured by a company that invented, designed and put it into operation. Many players eventually find that they only enjoy playing on machines from specific manufacturers, so they narrow down their selection by preferred software manufacturers. In the Czech Republic, the most popular machines are from local software manufacturers such as Kajot or Synot.
What are the Cylinders or Reels on a slot machine?
Reels are the basic element of most slot machines and are columns of symbols that spin and stop on the screen gradually during the game. They are therefore the basic element on which symbols spin and on which winning combinations are formed. The most popular numbers of reels are 3 and 5.
Paylines on slot machines are imaginary lines that run through the reels of the machine and determine which combinations of symbols on these lines are considered winning. As the reels spin, players try to achieve winning combinations of symbols on these lines. Combinations must always start from the left. Each payline has its own payout value, and the winnings are determined by the paytable for each symbol on the particular machine. Modern slot machines can have hundreds of paylines, and players often have the option to choose how many of these lines they bet on.
10 paylines
Themes
Each slot machine has its own design or theme that appeals to a specific group of players. If you want to play slots with fruit symbols 🍉 or with an Egyptian theme 🐫, no problem. Just choose and we will narrow down the selection of slots to your taste.
The RTP of slot machines is a rule of thumb for how much money a slot machine will return to players. Let's say you put 100 crowns in it, the RTP determines how much of that money you should get back. The average value is 92 to 97%.
96%
Layout
5x3
Slot theme and symbols
The graphics of Gem Blast are one of its strongest points, with high-quality graphics depicting sparkling gems and a backdrop inspired by the aurora borealis. The sound design complements the visual theme and increases the immersion of the game. The Diamond Star acts as a wild symbol that can substitute for all other symbols to form winning combinations. It appears on reels 2, 3 and 4 and expands to the entire reel, triggering a respin. If additional wild symbols appear during a re-spin, up to three re-spins can be awarded. One of the key features of Gem Blast is the ability to win in both directions, from left to right and right to left, effectively doubling your chances of winning.
Theme and Symbols Gem Blast
Sevens
BAR
Orange Diamond
Yellow Diamond
Green Diamond
Dark Blue Diamond
Blue Diamond
Purple Diamond
Special Symbols and Slot Features
3D
NO
Autoplay
YES
Free Spins
NO
Gamble Feature
NO
Locking Symbols
NO
Wild Symbol
YES
Win Multiplier
NO
Other features
Expanding Wild
Other Features
WILD Symbol
This symbol can substitute for all other symbols in the game, helping to create winning combinations. It only appears on reels 2, 3 and 4. When it appears, it expands to cover the entire reel and triggers a respin. This feature can be activated up to three times in a row if additional WILD symbols appear during the respin.
Wins both ways
The game allows winning combinations from left to right and right to left, effectively doubling the chances of winning.
Re-spin
When a WILD symbol appears on the reels, it expands to cover the entire reel and triggers a respin, giving the player another chance to win. If another WILD symbol appears during the respin, the process is repeated, which can result in a series of up to three respins.
Prize table
Symbol
Multiplier
2x in payline
3x in payline
4x in payline
Sevens
100x
500x
1000x
BAR
50x
200x
500x
Orange Diamond
20x
50x
200x
Yellow Diamond
20x
50x
200x
Green Diamond
10x
30x
150x
Dark Blue Diamond
10x
30x
150x
Blue Diamond
10x
20x
100x
Purple Diamond
10x
20x
100x
Our rating of the game
Gem Blast
Gem Blast is a well-designed online slot machine that offers a combination of simple mechanics and exciting features. Its stunning visuals, along with an innovative two-way win mechanism and the potential for big wins thanks to expanding WILD symbols and the Risk Game, make this a must-try for all slot fans. Although the specific RTP (return to player) and volatility for Gem Blast are not heavily highlighted, Endorphina games typically offer competitive RTPs, often around the standard 96%. The game features suggest medium volatility, which balances frequent smaller wins with the possibility of bigger wins during respins. Whether you are a casual player or an experienced gambler, Gem Blast provides an entertaining and potentially profitable gaming experience.
We evaluate slot machines based on multiple criteria, from which we make our final verdict.
Design and theme
84 %
Features and playability
86 %
RTP and volatility
96 %
Pros
The ability to win from left to right and right to left effectively doubles the chances of winning, which increases the appeal of the game.
The wild symbol (Diamond Star) not only substitutes for other symbols, but also expands to the entire reel and triggers respins. This can lead to a number of repeat winning chances.
High-quality graphics inspired by the aurora borealis and gemstones make the game visually appealing. The sound design complements the atmosphere and increases immersion in the game.
Cons
Unlike some other slots, Gem Blast does not offer special bonus rounds or free spins, which may be less attractive to some players.
The game is likely to be of medium volatility, meaning that the wins may not be as frequent or as big as on higher volatility slots. This may discourage players looking for quick, big wins.
The Gem Blast online slot machine does not offer any special free spins features or Scatter bonus symbols during the spins.
Bonuses to casinos where slots Endorphina slots can be played
Rating
91%
How do we rate bonuses?
The overall bonus rating is determined based on several factors: the amount of the bonus, the company's rating, the ease of obtaining it, the players' rating and the conditions for obtaining the bonus.
18+. New Players Only. £10 minimum deposit. 100% up to a maximum of £200. The welcome offer can be activated only once. 30 calendar days to activate. 35x wagering. 60 calendar days from activation to complete wagering. The 100% bonus up to £200 will be paid out in 10% increments to your Main Account balance. Bonus balance is not payable. Any remaining bonus balance will be forfeited upon withdrawal. T&Cs Apply. BeGambleAware.org
Rating
90%
How do we rate bonuses?
The overall bonus rating is determined based on several factors: the amount of the bonus, the company's rating, the ease of obtaining it, the players' rating and the conditions for obtaining the bonus.
18+. New players only. Opt-in required. Min deposit £10. 100 bonus spins valid on Starburst. Bonus funds are 100% up to £100. Bonus spins credited at a rate of 20 bonus spins per day over five days, triggered on your first deposit. Bonus funds + spin winnings are separate to cash funds and subject to 35x wagering requirement [bonus + deposit].
Only bonus funds count towards wagering contributions. Bonus spins winnings capped at £50. £5 max bet with bonus funds. Bonus funds must be used within 30 days, spins within 10 days. Affordability checks apply. Terms Apply. BeGambleAware.org.
Warning: Play and gamble responsibly | Gambling may be addictive 18+ | Underage gambling is an offence | When the fun stops, stop.
18+. New Players Only. £10 minimum deposit. 100% up to a maximum of £200. The welcome offer can be activated only once. 30 calendar days to activate. 35x wagering. 60 calendar days from activation to complete wagering. The 100% bonus up to £200 will be paid out in 10% increments to your Main Account balance. Bonus balance is not payable. Any remaining bonus balance will be forfeited upon withdrawal. T&Cs Apply. BeGambleAware.org
18+. New players only. Opt-in required. Min deposit £10. 100 bonus spins valid on Starburst. Bonus funds are 100% up to £100. Bonus spins credited at a rate of 20 bonus spins per day over five days, triggered on your first deposit. Bonus funds + spin winnings are separate to cash funds and subject to 35x wagering requirement [bonus + deposit].
Only bonus funds count towards wagering contributions. Bonus spins winnings capped at £50. £5 max bet with bonus funds. Bonus funds must be used within 30 days, spins within 10 days. Affordability checks apply. Terms Apply. BeGambleAware.org.
18+. New Players Only. £10 minimum deposit. 100% up to a maximum of £200. The welcome offer can be activated only once. 30 calendar days to activate. 35x wagering. 60 calendar days from activation to complete wagering. The 100% bonus up to £200 will be paid out in 10% increments to your Main Account balance. Bonus balance is not payable. Any remaining bonus balance will be forfeited upon withdrawal. T&Cs Apply. BeGambleAware.org
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