Mermaid’s Diamonds Slot Machine

Swim to the deepest depths of the ocean and see what hidden treasures lay underneath the undertows. But, can you hold your breath long enough to find the jackpot prize?

We, humans, have very limited capabilities when it comes to diving deep. So, why not enlist the help of a beautiful siren? Swim through the ocean floor and learn how the mermaid can amass the sea’s hidden wins when you read this Mermaid’s Diamond Slot Review.

Mermaid’s Diamond Slots is a medium variant ocean and mythological based theme slots game which consists of 270 paylines and 5 reels and is powered by PlayNGo software with a jackpot of £7200, the mermaid based game bonus features includes Trident Wild symbol and the Divine Intervention Feature.

Mermaid’s Diamonds Slot Sites

From our research, we have created a list of Mermaid’s Diamonds Sites in September 2021:

  • Sun Bingo

    Sun Bingo Logo

    Until 31/12/21. New customers only. 18+ Deposit & spend £10 on Bingo to receive £50 Bingo Bonus & 50 Free Spins (selected slots only 20p per spin). Free Spins must be accepted within 48 hours, winnings have 30x wagering which must be wagered within this time. Bingo Bonus has 4x Wagering, bonus must be accepted & wagered within 7 days. 1 new player offer only. Deposits made with Neteller/Skrill/PayPal are not valid for this promotion. UK & ROI. Full T&Cs apply. Please play responsibly.

    Full T&C's Apply

  • Buzz Bingo Slots

    Buzz Bingo Logo

    First depositors only. Deposit & Stake £20 on Midnight Wilds slot game: Get 110 Bonus Spins on Midnight Wilds slot at 5p (5 lines x 1p) per spin. Jackpot cannot be won when using free spins. Customers will also be eligible for existing standard sign up bonuses if they stake an additional £10 on Bingo, see T&Cs for details. £5 min. withdrawal on winnings. 18+ Please play responsibly.

    Full T&C's Apply

  • BGO Slots

    BGO Slots

    UK only. Win up to 500 spins from Mega Wheel on 1st deposit. 24-hour expiry. Max bet £2.50, Max Spins win £8 per 10 spins, Max Bonus win £150, selected games & 65x wagering on winnings. Min deposit £10. No Neteller/Skrill. Full T&Cs apply

    Full T&C's Apply

  • Mecca Slots

    Mecca Slots Logo
    SPEND £10 PLAY WITH £60

    New Customer Must Deposit and Spend £10 on Bingo within 7 Days. £30 Bingo Bonus (1X Wagering) £20 Slots Bonus On Reel King Mega (4X Wagering) and £10 of Club Vouchers. Keep it fun – set your deposit limit. T&Cs Apply.

    Full T&C's Apply

  • PlayOJO Casino

    Play Ojo Logo

    This offer is only available for first time depositors. Min deposit is £10. 50 Free Spins on Rich Wilde and the Book of Dead Slots. Spin Value: £0.10. After your first deposit you may claim your 30 Extra Free Spins by visiting the Kicker Section. No min withdrawal. This offer cannot be used in conjunction with any other offer. This offer is only available for specific players that have been selected by PlayOJO. If you have arrived on this page not via the designated offer via PlayOJO you will not be eligible for the offer. OJO’s Rewards and Game Play policy applies.

    Full T&C's Apply

  • Gala Spins

    Gala Spins logo

    18+. New customers only. Certain countries only. Min deposit and spend £10 cash on any game = £30 welcome bonus. 20 x wagering reqs apply. Bonus valid for 7 days. Payment restrictions & T&Cs apply. Players restrictions and T&Cs apply.

    Full T&C's Apply

  • 888 Games

    888 Games Logo

    New players only • Immediate £12 Bonus upon registration • Bonus must be claimed within 48 hours of receiving the claim email • Bonus expires after 14 days • Bonus wins are capped at £500 • To withdraw bonus & related wins, wager 30 x (bonus amount) • Wagering requirements vary by game • Withdrawal restrictions & full T&Cs apply

    Full T&C's Apply

  • The Sun Vegas

    The Sun Vegas Logo
    100% BONUS UP TO £300

    New Customers Only. 100% Deposit Match up to £300. Min deposit £10. 50x Wagering applies to the Bonus + Deposit amount, playable on selected slots only. Bonuses must be accepted within 72 hours and are valid for 30 days and wagering requirement must be completed in this time. Bonus amount can’t be withdrawn. Max bet restrictions apply. Not all games contribute equally to wagering requirements. Deposits made with Neteller and Skrill are not valid for this promotion. 18+ Full T&C apply. Please Gamble Responsibly.

    Full T&C's Apply

  • Power Spins

    Power Spins Logo
    100% BONUS UP TO £100

    New customers only. 100% up to £100 on 1st deposit. 65x wagering. Max bet 10% up to £2.50. Max win £2k. Selected games only. 7-day expiry. No Neteller/Skrill. Full T&Cs apply.

    Full T&C's Apply

Mermaid’s Diamonds SlotsAttributes

Casino Game:

Mermaid’s Diamonds Slots


720 line slots


5 reel casino slots 


Play N Go Games

Minimum Bet:


Max Bet:



Medium Variance Slots




Slot Theme: 

Mermaids, Sea Life, Fantasy and Mythology

Bonus Features:

Trident Wilds

Divine Intervention

Free Spins

Max Win:


Free Spins:


Release Date:

1st September 2017

Mermaid’s Diamonds Slot Machine

About Mermaid’s Diamonds Slot Game

Under the sea is where all the colourful, vibrant, and rare treasures lay – treasures like diamonds, rubies, emeralds, and sapphires that have fallen onto the ocean floor through countless shipwrecks. The ocean claims everything beautiful, much like the mermaids – maidens who wander the sea, luring in sailors and players alike to dive down deep and seek hidden gems.

Now, the earth is covered mostly by water, over 70% to be exact. Out of the vast expanse of sea, only 5% of that has been explored. So what swims around or lays hidden in the underwater currents of the remaining 65%?

Find out when you play this underwater adventure with a beautiful siren and her fishy friends. Swim alongside them in this five reels, 720 pay-line video slot game as they lead you through their watery domain and bring you some wilds, scatters, free spins, and even a jackpot prize of 500,000!

To lure you even deeper into the sea’s depths, Play ‘n GO gives players the chance to win additional wilds thanks to the Trident Wilds feature, as well as an unlimited amount of free spins as these depend on the treasure chests chosen by the players.

Underwater adventures are always more intriguing whenever merpeople are involved, aren’t they?

With 720 ways to win, players are sure to be swimming through the reels for hours on end, especially with the wonderful graphics and beautiful illustrations making everything all the more realistic. The entire game is spent underwater by the sea bed. Thankfully, players won’t have to hold their breath for long until a win comes swimming along.

So, if you’re up to dive down deep for some watery wins, then flip your tails and see just how many prizes your fins can lead you to.

How to Play Mermaid’s Diamonds Slot Online

Here are a few tips and tricks to remember when playing with the mermaid:

Click the (+/-) buttons to modify the number and value of coins to bet per spin. Then you can click the Spin button to begin the game.

Venture into the corners of the seven seas when you play the game from any mobile (Apple or Android), tablet, or PC/ Desktop device.

Interactive Features

Wilds. There are two types of wilds in this video slot, the regular wild and the trident wild. Either wild is represented by the mermaid.

Regular Wilds. The mermaid wild symbol and can either become an expanding wild or come as a single or double symbol on the reels. This symbol can replace all other symbols apart from the scatter.

Trident Wilds. For this feature, the game randomly adds as many as two wilds to the reels to increase the possibility of landing a winning combination.

Scatter and Free Spins. The treasure chest represents the scatter symbol. To trigger the free spins bonus, players will need to land one treasure chest scatter symbol on each reel.

What Symbol Triggers Mermaid’s Diamonds Slot Bonus Free Spins?

Under the sea there are countless things to be found, that includes the free spin wins. Free spins are the sort of prizes one would be able to find in a buried treasure chest, so by getting five treasure chest scatter symbols on the reels, players can get anything from 10 to 25 free spins.

During this feature, players will get to choose one chest from the set of chests, each one holding a certain number of free spins. It’s during this round that players will also be able to collect some diamonds. Every time five diamonds land on the screen, players will win a wild which will expand and cover the entire reel. And by getting at least 3 to 5 wilds, players can win additional free spins.

Paylines and Stakes

Who knew it only took 0.20 to 100 coins per spin to explore the seven seas? Well, thanks to Play ‘n GO, players can now spin and get a chance to win the 500,000 jackpot prize along with the countless symbol payouts and bonus prizes that this video slot has to offer.

While the jackpot does take time to land, players can keep their eyes out for the high and low paying symbols.

The gems hold more value than the sea creatures, so they act as the higher paying symbols. By landing 3 to 5 of these on the reels, players can win anything between 0.32 to 16 coins. While landing 3 to 5 of the stingray, starfish, cuttlefish, and conch shell can bring players a minimum of 0.16 and a maximum of 1.20 coins.

Mermaid’s Diamonds Slot Game Software

Mermaid’s Diamonds is a slot game that was made possible by Play’n GO.

Play’n GO is world-renowned, and they are known for implementing more modern technology into their games to make better gaming solutions for the future.

What is Mermaid’s Diamonds Slot’s RTP?

Mermaid’s Diamonds is a non-progressive slot game that has an RTP of 96.5%. 

This game has an excellent Return to Player rate. So, with this kind of payout percentage, players can get a return average of £96 per £100 bet.

Slot Volatility

This online slot is a medium variance game. With this kind of volatility rating, the game provides players with pretty good and fair payouts that land in a semi-frequent manner.


Anything is possible under the sea, and according to Sebastian, the crab, “everything is better down where it’s wetter”. That rings true in this casino slot game as players have over 720 ways to win here and there are an infinite amount of free spins to be won.

So really, diving down to the ocean’s murky depths isn’t so bad when you have that many prizes to look out for. Now, as fun as this slot’s gaming experience may be, it may be better suited for those players who have a bit more experience playing this kind of game. That’s because it does take a little longer to land substantial amounts. But, despite this challenge, this video slot is refreshing, really intriguing, and quite a sight to behold. So, if you’re a fan of mermaids or underwater fun, then this is one slot game you wouldn’t want to sail past.

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