Spearhead Studios

Blue Diamond Book

Slots Video Slots Action & Adventure Egypt Book Gems Treasure

Egyptian Book slot with expanding symbols and multiplier reels

SlotRanker Score

/ 99

05099

The SlotRanker Score is calculated from the visible data below. It is not affected by affiliate deals, and it cannot be bought.

How this score is built

RTP

96.04%

return to player

Volatility

High volatility

variance

Max win

27,000×

top multiplier

Min bet

$0.10

per spin

Reels

10 lines

Player rating

4.4 ★

9 votes

DEMO Play free, no signup

Spearhead Studios

Embed on your site

4.4 / 5

9 ratings

User ratings are shown separately from the Slot Score unless stated otherwise.

Five weighted signals shape the composite. Four context signals refine ties. See how we rate for the full methodology.

Payouts & RTP9/10

RTP 96.04% → 9.0/10

Volatility9/10

high → 9.0/10

Win Potential8.9/10

x27000.00 (27000×) → 8.9/10

Features7/10

9 features → 7.0/10

Game Mechanics5.1/10

f=9 r=5 p=10 → 5.1/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility6/10

0.1–100 (×1000) → 6.0/10

Provider Reputation6.5/10

provider avg 6.5 → 6.5/10

Popularity7.5/10

synthetic proxy → 7.5/10

Popularity blends real player search demand (~30 markets) with a catalogue-derived proxy; games without measurable search demand use the proxy alone. Not live play telemetry.

Cite this score

SlotRanker Score: 76 — Blue Diamond Book by Spearhead Studios

https://slotranker.com/spearhead-studios/blue-diamond-book#score

How to cite

Slot Summary

Spearhead Studios frames its work through a Local Games for Local Markets vision, and Blue Diamond Book applies that position to the established Book of slot format. The Egyptian adventure moves from a ten-line base game into Free Spins with an expanding special symbol and expanding Scatter Wilds. Multiplier reels support the high-volatility game's 27,000x ceiling.

How It Plays

The base game uses five reels, three rows, and ten fixed paylines paying from left to right. The Blue Diamond Book serves as both Scatter and Wild.

Ordinary line evaluation gives way to a symbol-expansion rule in Free Spins, where the selected special symbol can cover complete reels when enough copies appear.

Theme & Atmosphere

Egypt, Book, Gems, Treasure, and Action and Adventure themes follow an explorer into a pharaoh's underground tomb in search of the blue diamond book.

The familiar tomb expedition gives the Scatter Wild a clear thematic role: the book is both the sought object and the symbol that opens Free Spins.

Action & Adventure Egypt Book Gems Treasure

Features & Win Potential

The Blue Diamond Book substitutes as a Wild during the base game while also serving as the Scatter that activates the feature round.

During Free Spins, expanding Scatter Wilds carry win multipliers, while three multiplier reels create the route toward the game's highest stated win potential.

High volatility Free Spins Multiplier Scatter Symbol Wild Symbol 5 Reels RTP range 10 Paylines 96% RTP

Bonus & Free Spins

Three Scatter Wilds award ten Free Spins. The game then randomly selects one of the regular symbols to act as the expanding special symbol.

A qualifying number of selected symbols makes each one expand over its full reel, while expanding Scatter Wilds can apply multipliers to feature wins.

Spec sheet

Blue Diamond Book at a glance.

Identity

Slot nameBlue Diamond Book

StudioSpearhead Studios

Released2/23/2021

Math

SlotRanker Score76

RTP96.04%

VolatilityHigh volatility

Max win27,000×

Bet range$0.10 – $100.00

Player rating4.4 / 5 · 9 votes

Format

Reels5

Paylines10

Layout5x3

Features

Themes

Expected average based on this slot's 96.04% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$1.58

Cost per session$1.58

Estimate only, for entertainment purposes — treat gambling as entertainment, not a way to make money, and set a budget you can afford to lose.

How long could a bankroll last on Blue Diamond Book? We simulate thousands of sessions from this game's published RTP and volatility — the long-run math, not a prediction of your next spin.

Bankroll ($)Bet per spin ($)Speed

Volatility tier: High

Running simulation…

How this works

Each simulated spin either misses or returns a win drawn from a log-normal distribution, with the hit rate and spread set by the slot's volatility tier (High). The model is calibrated so the average return equals this slot's published RTP (96.04%), with wins capped at its top multiplier (27,000×).

This is a simplified, parametric model of the game's math — not its real paytable. It exists to make the house edge visible over many sessions, so the numbers above are averages across thousands of runs, never a forecast of one.

This is math, not a prediction. Real sessions vary wildly, and no strategy changes a game's built-in house edge. Play for fun, set limits, and never bet more than you can afford to lose.

Where to play Blue Diamond Book

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Compare Blue Diamond Book with other games

	Blue Diamond Book Score 76This game	Jungle Jim Gold Blitz Score 79	Books and Pearls Respins of Amun-Re Score 76	Book of Gems Megaways Score 75	Book of Secrets Extra Score 66
Identity
Studio	Spearhead Studios	Stormcraft Studios	Gamomat	Skywind Group	Synot Games
Released	2/23/2021	2/3/2025	1/21/2020	1/15/2021	10/6/2022
Math
RTP	96.04%	96%	96.1%	95%	96%
Volatility	High volatility	High volatility	High volatility	High volatility	High volatility
Max win	27,000×	5,000×	1,500×	1,000×	500×
Format
Reels	5	6	5	6	5
Layout	5x3	6x4	5x3	6x7	5x3
Paylines	10	4096	10	3125	10
Min bet	0.1	0.2	0.1	0.4	0.2
Max bet	100	50	100	100	1
Features
Progressive	—	—	—	—	—
Wild symbol	✓	✓	✓	✓	✓
Free spins	✓	✓	✓	✓	✓
Scatter symbol	✓	✓	✓	✓	✓
Multiplier	✓	✓	—	—	—
Bonus game	—	✓	✓	—	—
Respins	—	✓	—	—	—

Every number is shown as a delta against Blue Diamond Book.

Comparing against

Blue Diamond Book

Spearhead Studios

RTP

96.04%

Max win

27,000×

Score

Jungle Jim Gold Blitz

+ Bonus Game+ Respins

Books and Pearls Respins of Amun-Re

+ Bonus Game− Multiplier

Book of Gems Megaways

Book of Secrets Extra

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