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We evaluate slot machines based on multiple criteria, from which we make our final verdict.
Design and theme
80 %
Features and playability
70 %
RTP and volatility
98 %
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 developed by a company that invented, designed and put it into operation. Many players eventually find that they only enjoy playing on machines from specific software provider, so they narrow down their selection by preferred brand.
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.
85%
Editor's rating
Design and theme
84 %
84 %
Features and playability
86 %
86 %
RTP and volatility
96 %
96 %
How do we rate slot machines?
We evaluate slot machines based on multiple criteria, from which we make our final verdict.
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.
Manufacturer Endorphina
Endorphina is a Prague-based online casino software developer founded in 2012, known for creating visually stunning and mathematically balanced slot games. π° The company combines classic slot mechanics with innovative features and engaging storylines, appealing to both traditional and modern players. Endorphinaβs portfolio includes popular titles like Book of Vlad, Hell Hot 100, and Chance Machine 40, all designed in HTML5 for seamless play across devices. Licensed and regulated by reputable authorities, Endorphina continues to stand out in the iGaming world for its creativity, reliability, and focus on player experience.
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. Β£10 minimum deposit. 100% up to a maximum of Β£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 Β£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. GambleAware.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. Min dep. Β£20. Valid for 14 days from registration. Welcome Offer: Earn points for cash bets made to unlock wager-free spins on selected games: 2 points for every Β£10 bet on Slots, 1 point for every Β£10 bet on Video Poker and qualifying Side Bets. 0.25 points for every Β£10 bet on Roulette games. Maximum accumulation of redeemable points is limited to 2000. You will receive spins based on the number of points earned:10, 20, 35, 50 points = 5 spins, 70 points = 1 Superspin, 100 points = 10 spins, 200 points = 5 Superspins, 300 points = 4 Superspins, 500 points = 6 Superspins. Additionally you will earn an extra 120 Spins for every 375 points earned above the 500-point threshold, until you reach a total of 2000 points. Spins credited the next day. Spin winnings credited as cash funds and capped at Β£100 per batch of spins. Cash funds are immediately withdrawable. Wager-free spins must be used within 72 hours. 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. Β£10 minimum deposit. 100% up to a maximum of Β£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 Β£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. GambleAware.org
18+. New players only. Min dep. Β£20. Valid for 14 days from registration. Welcome Offer: Earn points for cash bets made to unlock wager-free spins on selected games: 2 points for every Β£10 bet on Slots, 1 point for every Β£10 bet on Video Poker and qualifying Side Bets. 0.25 points for every Β£10 bet on Roulette games. Maximum accumulation of redeemable points is limited to 2000. You will receive spins based on the number of points earned:10, 20, 35, 50 points = 5 spins, 70 points = 1 Superspin, 100 points = 10 spins, 200 points = 5 Superspins, 300 points = 4 Superspins, 500 points = 6 Superspins. Additionally you will earn an extra 120 Spins for every 375 points earned above the 500-point threshold, until you reach a total of 2000 points. Spins credited the next day. Spin winnings credited as cash funds and capped at Β£100 per batch of spins. Cash funds are immediately withdrawable. Wager-free spins must be used within 72 hours. Terms Apply. BeGambleAware.org.
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Software provider
Game typeSlot
Reels
Winning paylines10 paylines
