Mermaid's Diamond Online Slot

Date Updated:21 Oct 2019 Written by Gennaro Donnarumma

Mermaid's Diamond is a 720-payline video slot powered by Play’n GO software. This slot is inspired by a fantasy underwater world where mermaids, sea creatures, jewels and treasure chests feel right at home. The most important symbols are the Mermaid, which is the Wild symbol, and the Treasure Chest, which stands for the Scatter symbol.

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This game is available to play for real money mode at any of these casinos

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Mermaid's Diamond


Progressive Jackpot: No

Software: Play’n Go

Paylines: 720

Reels: 5

RTP: 94.45%

When it comes to online slots, there have been many journeys down to the bottom of the ocean. However, Mermaid’s Diamond by Play’n Go aspires to offer punters something different especially with the bonus features that it has.

Mermaid’s Diamond is a five-reel slot with variable rows and 720 ways to win which means that winning combos can be formed as long as there are matching symbols in adjacent rows beginning from the left or right-hand side.

Before you can dive head first into the ocean of underwater riches and long-lost gemstones, players are advised to set their betting range. Clicking on "+/-" allows setting the coin size, which ranges from 0.2 to 100. By choosing the "Autoplay" option players will set the number of times they wish for the reels to turn without interruption and "Play" button is used to set the reels in motion after setting the bets.

In this day and age, players are unlikely to come upon a game that isn’t fully up to speed when it comes to intuitive 3D graphics. One of the primary attractions any console can offer – arguably must definitely offer – is a great interactive visual/audio experience. The free Mermaids Diamond slot has all of this in spades, with each element and game feature within this breathtaking underwater setting presented in such pristine fashion which makes for a gaming experience that is enthralling and engaging.

The whole mermaid spiel may have been done one too many times, but the game developer certainly deserves a ton of credit for breathing new life into this theme. As far as most will be concerned, this game looks, sounds and functions like no other of a similar theme in recent memory.

There’s very little to complain about in this game. Everything from the way it is presented to the volatility it packs into every spin is worth noting for the contribution it eventually makes to the overall experience afforded to each and every punter.


The higher-value symbols include a diamond along with red, blue and green gems. The lower-values are represented by a flatfish, a starfish, a squid and a shell. The red-haired mermaid is wild and she will substitute for all others to form winning combos except for the treasure chest scatter icon.


Free Spins

This is initiated by landing five of the treasure chest scatter symbols anywhere in view and you will now be asked to click each chest, in turn, to reveal a number of free spins – up to 25 in total. If you land only four chests on the reels on a non-winning spin in the base game, there’s a chance of experiencing Divine Intervention in which a fifth chest will appear and trigger the spins.

When the spins are underway any diamonds landing will be collected – when you have five at least one reel will become completely wild until the end of the spins. Landing three, four or five chests during this round will award three, four or five extra spins respectively.

Trident Wilds

During the base game and free spins one or two wild symbols may be added to the wilds to help you out with some bigger wins.