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Book of Diamonds Slot - Review, Free & Demo Play

Book of Diamonds
Book of Diamonds
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Updated: 22.07.2025
Reviewed by: Fabio Duarte
Book of Diamonds is a classic slot of “Book of” mechanics from Spinomenal. A simplistic gameplay, playful soundtrack, and potential for big wins can attract many players. You are welcome to get to know all the secrets of the Book of Diamonds released on 06/07/2020 by reading this review.

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In this review
  1. Slot details
  2. Theme
  3. Bonus Rounds & Free Spins
  4. Summary
  5. Where to play
General information about Book of Diamonds slot

General information about Book of Diamonds slot

Rating by Fabio Duarte:
7.6
Spinomenal
Write a review +25 SJ points
  • Release Date:
    06.07.2020
  • Volatility:
    High
  • RTP:
    96.1%
  • Multiplier:
    No
  • Max. win:
    5,000x
  • Bonus game:
    No
  • Free spins:
    Yes
  • Scatter Symbol:
    Yes
  • Wild symbol:
    Yes
  • Symbol Stacked:
    No
  • Jackpot Game:
    No
  • Slot lines:
    10
  • Slot reels:
    5
  • Layout:
    5-3
  • Stakes range (€/£/$):
    0.1 to 100
  • Slot Theme:
    Fruits
  • Technology:
    JS, HTML5
More infoLess info

Licensed and tested by

  • Gambling Comission
  • MGA
  • ONJN

How to Play

A how-to-play guide for Book of Diamonds is available below;

  1. Visit an online casino and find the slot in the lobby
  2. Launch the game and click “Start” once the content is fully loaded
  3. Settle the by size from €0.1 to €100 per spin
  4. Check rules & payouts and adjust the slot’s settings if needed
  5. Start rolling the reels manually or automatically

Book of Diamonds has a standard 5x3 grid with 10 fixed betlines. The slot gives winning combinations from left to right on consecutive reels. All winning lines must start from the far-left side.

Aside from the base game, the slot offers free spins with expanding symbols.

Book of Diamonds RTP and Volatility

8.1 
Book of Diamonds is a highly volatile slot with an RTP of 96.14%.

It’s hardly surprising that Book of Diamonds has a high variance. Most of the slots with “Book of” mechanics are volatile. The game has a varied paytable; the highest-pay 5-symbol line is 50 times bigger than the lowest-pay one. Free spins are also unpredictable.

The theoretical return to player of Book Diamonds is 96.14%, right about the industry’s average value.

Theme

8.5 

Book of Diamonds is a retro slot with classic symbols and an adorable disco soundtrack. It looks like a land-based slot machine from the 80s. Nice starlight and glowing animations make the atmosphere very playful. The most fitting description of the slot’s look and the theme is “modern classic”.

A total of 10 symbols are present in the Book of Diamonds, with 9 being regulars. Low-paying symbols are traditionally represented by fruits, such as cherry, pear, orange, plum, and watermelon with the highest payout of 1.5x the bet. The medium symbols are BAR, bell, Seven, and red diamond paying 50x your stake for 5 icons on a payline.

The book is Wild Scatter, which pays anywhere. It substitutes regulars on the reels and triggers free games.

Theme
Book of Diamonds slot paytable

Mobile Compatibility

Book of Diamonds slot mobile

You can enjoy the fantastic atmosphere of Book of Diamonds on your smartphone or tablet. The slot is compatible with modern mobile devices based on Android or iOS.

You don’t need to do any specific manipulations to load the slot’s mobile version. Just start the game in the lobby from your device and enjoy an adaptive UI. Use a touchscreen for navigation and to control the gaming process.

About Spinomenal

Spinomenal is a thriving casino developer with offices in multiple countries, including Malta and Israel. The company was established in 2014 and is a significant player in the iGaming industry. The developer’s portfolio contains 300+ titles. You will be impressed by the diversity of Spinomenal content, as the company produces slots of various genres and mechanics, from 1-liners to innovative tumbling games. Slots like Book of Rebirth or Majestic King are considered all-time hits.

Aside from developing slots, Spinomenal offers various B2B and B2C services. The company holds an MGA license.

Bonus Rounds & Free Spins

7.8 

Free Spins

Land at least 3 Books to trigger 10 free games. At the start of free spins, an expanding regular-pay symbol will be chosen. A chosen symbol will expand during free games and pay anywhere.

If a chosen symbol is low-pay, it will expand if you land it on 3+ separate reels. If a chosen symbol is high-pay, it will expand only if you land it on 3+ different reels.
Book of Diamonds slot Free Spins

Buy Feature

Don’t want to waste time waiting for triggering free spins? then buy them! You can do this for 104x your bet.

Book of Diamonds Demo Play

The most efficient way to learn the gameplay and payouts of Book of Diamonds is by playing it for free. Luckily, Slotsjudge visitors can spin the slot without the risk on this page, as we loaded its demo version.

Enjoy a demo play, and don’t worry about losing or winning. Just learn the slot and use free sessions as an opportunity to prepare for the money game.

Max Win

6 
The maximum multiplier of Book of Diamonds is 5,000x.
It’s not the first and not the last slot of “Book of” mechanics with the max win of 5,000x. Collecting a max win in Book of Diamonds requires filling the entire board with the highest-pay symbol (seven). Of course, the chances of getting big wins are higher during free spins due to expanding feature.

Overall Rating

7.6
There are thousands of slots that have a “Book of” mechanics. But we are not sure if there is another classic game with classic symbols that offers a “Book Of” pattern. So, Book of Diamonds exemplifies how combining familiar attributes can lead to unique results.
Hits
Wild Scatter
Free spins with expanding symbol
Misses
Some players may find the game repetitive
Overpriced buy feature

Book of Diamonds Slot - FAQ

Can I retrigger free spins in Book of Diamonds?

You can retrigger free spins by catching another 3+ Scatter symbols.

How much money can is it possible to win in Book Diamonds?

You can win more than €500,000.

How to enable a fast play in Book of Diamonds?

Click on the rabbit icon below the slot’s control panel.

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Fabio Duarte
Fabio Duarte
Expert in: News, Blog, Slot reviews, Payments
Fabio is a young writer with +6 years of experience in gambling & betting. Fabio creates professional reviews of casino and slots. Every single article Fabio made exhibits deep analytical skill and comprehensive coverage of a topic. It’s Fabio – one of the leading authors on slotsjudge.com.

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