mermaid's diamond

It seems like Play’n GO is following in the tradition of IGT slots like Siberian Storm and Hexbreaker with Mermaid’s Diamond. The reel set-up is similar to these other two slots, and they also follow the same pattern of needing 5 scatters to trigger the free spins round. Aside from these characteristics, the Mermaid’s Diamond slot is unique in terms of both design concepts and its other special features. This slot from Play’n GO is a 5-reel, 720 pay-way video slot of medium volatility. It has an RTP of 96.5% and a maximum win of 5,000x your original stake. We found this slot to actually be decent in terms of payouts and hit frequency. To find out more, continue reading this full Mermaid’s Diamond slot review. 

Slots Features


Mermaid’s Diamond has a number of special features that make the slot very entertaining.

Re-triggers of free spins are unlimited – if you keep getting free spins, the feature only stops when you reach the maximum win.

Consistent payouts throughout the gameplay, with occasional big wins, make Mermaid’s Diamond pretty profitable.


Base game has low payouts, it’s really the special features that make this slot fun.

Can be difficult to trigger the Free Spins given that you need 5 scatters.

The slot is not volatile enough to grant big wins.

TYPEVideo slot
REELS AND PAYLINES5 reels, 720 ways to win
GAME FEATURESWild, Scatters, Trident Wilds Feature, Free Spins, Divine Intervention Feature
RANGE OF BET$0.20 – $100.00
COIN VALUES0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.75, 1.00, 1.25, 1.50, 2.00, 2.50, 3.00, 3.50, 4.00, 4.50, 5.00
MAXIMUM WIN500,000 coins

Play Mermaid's Diamond at these online casinos

mermaid's diamond
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Theme & Background

The theme of this slot is very obviously the wonders of the ocean. Legend has it that all sorts of mysteries lie under the surface of the sea. Atlantis, a couple of shipwrecks, and mermaids. Maybe even Poseidon himself. But, back to mermaids, it seems that this mermaid has a few diamonds up her sleeve. The Diamond symbol is in fact the highest paying symbol in the slot, paying 2.00 coins to your 1.00 bet (doubles your money).

Of course, all the other symbols are also nautically-themed or sea-creature themed. If you look at the banner up above, you can tell Play’n GO are trying to emulate Finding Nemo’s cast of fish. Looks like we’ve found Dory, and Nemo’s dad too. The overall graphics and animation of this slot is satisfactory, as is expected of Play’n GO. There isn’t anything too complicated in terms of design, unlike other Play’n GO slots like Hugo and Viking Runecraft. But Mermaid’s Diamond is polished, which is what’s most important when you’re playing.


Although Mermaid’s Diamond is of medium volatility, so the payouts aren’t huge, it’s still really exciting to play. The number of features it has along with the frequency at which they’re triggered make this slot one you shouldn’t pass up on. After all, with 720 ways to win – you really can’t tell when and how you’re going to hit your next winning combo.

Explore Mermaid’s Diamond Symbols


The Wild symbol is represented by the Mermaid herself. She can either appear as a single symbol, or Expanded covering up to three positions on the reels. Wild symbols can substitute for any other symbol, except scatter symbols. In this way, the player has a higher chance of landing winning combos and getting more payouts.

Trident Wilds Feature

The Trident Wilds Feature is triggered randomly in the base game. It can happen on any spin – there isn’t any particular combo that makes it more likely to activate. During the Trident Wilds feature, Wild symbols are added to the reels. It can add up to a maximum of 2 extra Wilds on any two reels. During this feature, little tridents will appear on the usual Wild symbol to show that the feature is in effect. But, it’s important to note that this feature doesn’t guarantee a win. So it might add Wilds – but you might not get a payout anyway. It’s up to Lady Luck, as it were.

Divine Intervention Feature

The Divine Intervention feature is pretty cool, we’ve got to admit. Poseidon himself reaches down (up?) to mess with the reels a little and tip them in your favor. Basically, if you manage to land 4 scatters on the reels in a non-winning spin, the fifth reel will also lock down a scatter. The point of this feature, and getting the 5 scatters, is to help the player trigger the Free Spins round more frequently. Like we said, pretty cool.

Free Spins

The Free Spins round is triggered by landing 5 scatter symbols on the reels. This can either happen normally, or via the Divine Intervention feature. Once it’s been activated, the player has to choose 1 out of 5 treasure chests that contain a number of free spins. Depending on what you choose, you can get 10, 15 or 25 free spins at first. But, the absolute god-smacking best part about the Free Spins is that they can be re-triggered. Indefinitely. That’s right, as long as you keep landing either sets of 3, 4 or 5 scatters on the reels, you’ll keep tacking on free spins.

  • 3 Scatters during Free Spins Round = 3 free spins
  • 4 Scatters during Free Spins Round = 4 free spins
  • 5 Scatters during Free Spins Round = 5 free spins

There is no cap on how many times you can re-trigger the free spins. The feature will only end, unless you run out of free spins of course, if you reach the maximum win. Which is 5000x your original stake.

If that wasn’t enough to make this feature amazing – there’s more. Landing 5 Sparking Diamond symbols during free spins will trigger the Trident Wilds feature for the Free Spins roundMeaning more chances of Wilds, meaning more chances at winning combos.It’s tough figuring out how this feature could get any better.

Payouts and Wagering Limits

Mermaid's Diamond Slot Paytable

Although Mermaid’s Diamond is of medium variance, don’t be fooled. This slot has really good return on the value of your money.Some of the higher paying symbols will pay 2.00 to your stake if you land 5-of-a-kind, and lower paying symbols pay 0.10 when landing 5-of-a-kind. It’s true that the overall payout won’t reach the mega wins of other more volatile slots, but Play’n GO have done really well in making this slot worth it for players.

Of course, the real ‘jackpot’ of this slot is if you trigger the Free Spins round. While the hit frequency on this is a bit low, once you do manage to activate it – you’re almost guaranteed some form of profit. If you wager mid-range bets on this slot, it should start paying off. But we wouldn’t recommend chasing big wins.

mermaid's diamond

Final Verdict

Mermaid’s Diamond


In conclusion, Mermaid’s Diamond is a slot which deserves a shot. It’s an honestly fun and entertaining video slot to play, and you might even make a little money from it. With awesome special features and graphics, this slot deserves a solid 4.5 star rating.

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