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We evaluate slot machines based on multiple criteria, from which we make our final verdict.
Design and theme
93 %
Features and playability
96 %
RTP and volatility
96.6 %
Slot machine details and review Mermaid’s Diamond
Mermaidβs Diamond is a fascinating online slot machine from the developer PlayΒ΄n GO, which focuses on an underwater world full of mysteries and treasures. This slot is popular for its high-quality graphics, innovative game mechanics and exciting bonus features. The game uses a unique reel format that allows for 720 ways to win. Combinations are counted from left to right. The reels are diamond-shaped with a 3-4-5-4-3 configuration.
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 game takes you to a mysterious underwater world where sirens and sea creatures await you. The graphics are stunning β the background depicts the depths of the sea, while the reels are surrounded by pearl shells, corals and seaweed. The sound of the game perfectly complements the atmosphere thanks to the gentle sounds of waves and a magical musical background. Classic card values ββin the style of shells are among the low symbols. Precious stones are among the higher ones. The WILD symbol appears to complete winning combinations and thanks to it you can also enjoy a very interesting bonus game. In the case of Scatter symbols, their function remains the same β triggering Free Spins and one great bonus feature. During the free spins, you can collect more Scatter symbols, which will add more and more free spins to you.
Theme and Symbols Mermaidβs Diamond
Diamond
Ruby
Saphire
Emerald
Skate fish
Starfish
Squid
Shell
Special Symbols and Slot Features
3D
NO
Autoplay
YES
Free Spins
YES
Gamble Feature
NO
Locking Symbols
NO
Wild Symbol
YES
Win Multiplier
YES
Other features
Bonus Game
Bonus Scatter
Scatter Symbol
WILD Symbol
The game features special WILD symbols that substitute for all other symbols except the Bonus Scatter symbols, creating the best possible winning combinations depending on the paytable.
Trident Wild Spin Feature
The Trident Wild Spins feature can be activated randomly during any feature game of the base game. During this feature, a random number of special WILD symbols will appear on reels 1-2 in the feature game.
Scatter symbol
The game features Scatter bonus symbols. If 5 Scatter symbols appear anywhere on the reels, the bonus spins will be activated within 1 regular game. When the Free Spins feature is activated, 5 chests will appear, from which the bettor will select 1 and the number of Free Spins awarded (10, 15 or 25) will be displayed. Your selection does not affect the payout percentage or the outcome of the game. During the Free Spins feature, all displayed Diamond symbols are added to the counter. If 5 Diamond symbols are collected, the Trident Wild Spins feature will be activated after the reels have stopped spinning for 1 bonus free spin.
In Bonus Spin mode, you can get additional bonus spins by landing Scatter symbols. If you land 3 Scatter symbols, you will be awarded 3 more bonus free spins, if you land 4 Scatter symbols, you will be awarded 4 more bonus free spins and if you land 5 Scatter symbols, you will be awarded 5 more bonus free spins.
Divine Intervention Feature
The Divine Intervention feature is purely random. It can be triggered during the base game after a non-winning spin. However, you need to land 4 Scatter symbols anywhere on the reels. If this feature is triggered, a fifth Scatter symbol will be added and the Free Spins feature will be activated.
Prize table
Symbol
Multiplier
3x in payline
4x in payline
5x in payline
Diamond
16x
32x
160x
Ruby
8x
20x
40x
Saphire
4,8x
12x
24x
Emerald
3,2x
8x
16x
Skate fish
2,4x
6,4x
12x
Starfish
2,4x
6,4x
12x
Squid
1,6x
4x
8x
Shell
1,6x
4x
8x
Our rating of the game
Mermaid’s Diamond
Mermaidβs Diamond is a perfect choice for players who like visually appealing games with deeper game mechanics. The bonus features are fun and often bring big rewards. The medium to high volatility is ideal for those who are willing to take risks to get bigger wins. This slot will not only entertain you, but also offer you a real chance to win interesting rewards. We can recommend the game not only to fans of underwater themes, but also to players looking for something more than just a classic slot.
The game differs from traditional slots due to its diamond-shaped reel arrangement (3-4-5-4-3), which provides up to 720 ways to win
Relatively high return to player offers fair chances of winning
Features like Divine Intervention and Free Spins add dynamics to the game and increase the potential for big wins
Diamonds in bonus rounds can activate special rewards, providing more motivation to play
Frequent occurrence of WILD symbols helps create more winning combinations
The underwater theme is elaborated in detail
Medium to high volatility is suitable for players who prefer occasional but larger wins
Cons
Can be more demanding on the bankroll as wins may not be very frequent, and the game thus requires patience
The diamond structure of the rollers can be confusing for beginners and takes longer to understand
Although bonuses are fun, they can take a long time to trigger
Big wins are more dependent on bonus rounds than regular gameplay
The underwater environment with mermaids may not be attractive to everyone
The game does not offer a progressive jackpot, which may be a disadvantage for players looking for higher risk and rewards
Manufacturer Play'n GO
The Play’n GO brand is one of the well-known online casino software developers. Over the course of its existence, this manufacturer has become one of the most popular suppliers of gaming software to leading European and global casinos. It is characterised above all by its combination of eye-catching graphics, animation and gameplay, which are qualities that every good gambler requires.
Bonuses to casinos where slots Play’n GO slots can be played
Rating
94%
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.
5 Free Spins – New players only, No deposit required, valid debit card verification required, max bonus conversion Β£50, 10x wagering requirements,Full T&Cs apply. Up to 500 Free Spins – New players only, Β£10 min fund, free spins won via mega reel, max bonus conversion to real funds equal to lifetime deposits (up to Β£250), 10x wagering requirements and full T&Cs apply. Gambleaware.org
Rating
94%
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.
Use the bonus spins offer at PlayOJO to get 50 FS on the Big Bass Bonanza slot. The minimum required deposit to activate the bonus is Β£10 and your spins can be played at the Β£0.1 chip size. Note that the bonus is not available for players from N.I. Irregular play may lead to the removal of rewards. Gambleaware.org. All the OJO Rewards and Game Play policies apply.
Bingo Bonus: First deposit only. Deposit Β£10 or more to claim. 50 free spins on Big Bass Bonanza slot. 500 free bingo tickets when you spend Β£10 on bingo, valid once per player. Free tickets valid on selected games up to Β£0.10 each, see bingo rooms for info. Excludes players in N.I. Irregular play may lead to removal of reward. OJOβs Rewards and Game Play policy applies.
Rating
93%
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.
New players only | 10x wagering on the 23 Free Spins | 77 Cash Spins after 1st time deposit and Β£10 wager on slots. No max cash out on Cash Spins. Skrill Deposits Excluded. | T&C’s Apply! Gambling can be addictive. Play Responsibly. 18+
Rating
93%
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.
11 FS – New players only. 18+. Min. deposit Β£10. Account ballance is withdrawable at any time. Upon withdrawal, any remaining bonus spins are forfeited. 7 days to activate the spins. Bonus spins will expire 24 hours after activation. Full T&C Apply.
Β£50 deposit bonus – New players only. Min. deposit Β£10. 30 days to activate & 60 days to use deposit bonus after activation. Wager req.: 10x on eligble games. Max. Bonus Β£50 . Bonus balance is paid with 10% Increments to account balance. Bonus balance is not payable. Max. bet is Β£20 or up to value 50% of the bonus amount – whichever is lowest. Account ballance is withdrawable at any time. Upon withdrawal, any remaining deposit bonus is forfeited. Full T&C Apply, play responsibly. Gambleaware.org
Rating
92%
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.
New players only | Deposit & wager at least Β£10 to get free spins | Free Spins winnings are cash | No max cash out | Eligibility is restricted for suspected abuse | Skrill deposits excluded | Free Spins value Β£0.10 per spin | Free Spins expire in 48 hours | 18+ | GambleAware.org. | T&C’s apply
Warning: Play and gamble responsibly | Gambling may be addictive 18+ | Underage gambling is an offence | When the fun stops, stop.
18+ | New players only | Minimum deposit of Β£10 required to unlock the bonus | First deposit is matched 100% | Maximum bonus is Β£200 | Bonus funds must be wagered 10x | Table casino games, live games and progressive jackpots won’t contribute towards wagering requirements | There’s a maximum conversion equal to lifetime deposits up to Β£250 | Gambleaware.org. | Terms & Conditions apply.
5 No-deposit Free Spins on Aztec Gems Slot
94%
+ Chance to win up to 500 Free Spins on Big Bass Splash and other prizes
5 Free Spins – New players only, No deposit required, valid debit card verification required, max bonus conversion Β£50, 10x wagering requirements,Full T&Cs apply. Up to 500 Free Spins – New players only, Β£10 min fund, free spins won via mega reel, max bonus conversion to real funds equal to lifetime deposits (up to Β£250), 10x wagering requirements and full T&Cs apply. Gambleaware.org
500 free bingo tickets when you spend Β£10 on bingo
94%
+ Deposit at least Β£10 and Get 50 FS on the famous Big Bass Bonanza slot
Use the bonus spins offer at PlayOJO to get 50 FS on the Big Bass Bonanza slot. The minimum required deposit to activate the bonus is Β£10 and your spins can be played at the Β£0.1 chip size. Note that the bonus is not available for players from N.I. Irregular play may lead to the removal of rewards. Gambleaware.org. All the OJO Rewards and Game Play policies apply.
Bingo Bonus: First deposit only. Deposit Β£10 or more to claim. 50 free spins on Big Bass Bonanza slot. 500 free bingo tickets when you spend Β£10 on bingo, valid once per player. Free tickets valid on selected games up to Β£0.10 each, see bingo rooms for info. Excludes players in N.I. Irregular play may lead to removal of reward. OJOβs Rewards and Game Play policy applies.
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Software provider
Game typeSlot
Reels
Winning paylines720 paylines
