Greentube

Diamond Mystery - 40 Charming 7's

RARE Slots Video Slots Classic Fruit Gems Star

Play Diamond Mystery - 40 Charming 7's slot by Greentube for free in demo mode! Explore RTP, bonus rounds, and key features before playing for real.

Only 0.3% of slots combine Mystery Symbol and Progressive Jackpot.

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SlotRanker Score

/ 99

05099

The SlotRanker Score is calculated from the visible data below. It is not affected by affiliate deals or paid placement.

How this score is built

RTP

95.48%

return to player

Volatility

—

variance

Max win

—

top multiplier

Min bet

$0.20

per spin

Reels

40 lines

Player rating

3.0 ★

8 votes

DEMO Play free, no signup

Greentube

3.0 / 5

8 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 & RTP8/10

RTP 95.48% → 8.0/10

Volatility8/10imputed

imputed medium (unknown) → 8.0/10

Win Potential—

no data

Features2/10

4 features → 2.0/10

Game Mechanics4.2/10

f=4 r=5 p=40 → 4.2/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility6/10

0.2–40 (×200) → 6.0/10

Provider Reputation5.5/10

provider avg 5.5 → 5.5/10

Popularity0/10

synthetic proxy → 0.0/10

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: 49 — Diamond Mystery - 40 Charming 7's by Greentube

https://slotranker.com/greentube/diamond-mystery-40-charming-7s#score

How to cite

Spec sheet

Diamond Mystery - 40 Charming 7's at a glance.

Identity

Slot nameDiamond Mystery - 40 Charming 7's

StudioGreentube

Released12/18/2024

Math

SlotRanker Score49

RTP95.48%

Max win—

Bet range$0.20 – $40.00

Player rating3.0 / 5 · 8 votes

Format

Reels5

Paylines40

Layout5x3

Features

Themes

Expected average based on this slot's 95.48% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$3.62

Cost per session$3.62

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 Diamond Mystery - 40 Charming 7's? 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: Mediumassumed — not published for this slot

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 (Medium). The model is calibrated so the average return equals this slot's published RTP (95.48%), with wins capped at its top multiplier (1,000×).

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.

Compare Diamond Mystery - 40 Charming 7's with other games

	Diamond Mystery - 40 Charming 7's Score 49This game	777 Super BIG BuildUp Deluxe Score 83	2023 Hit Slot Score 81	Fever Spin Megaways Score 81	Jokrz Wild UltraNudge GigaBlox Score 81
Identity
Studio	Greentube	Crazy Tooth Studio	Endorphina	iSoftbet	Bang Bang Games
Released	12/18/2024	7/12/2022	3/15/2023	6/14/2024	6/15/2023
Math
RTP	95.48%	96.19%	96.01%	95.99%	96.1%
Volatility	—	High volatility	High volatility	High volatility	High volatility
Max win	—	15,000×	93,750×	50,000×	7,216×
Format
Reels	5	5	6	6	6
Layout	5x3	5x3	6x4	6x7	6x4
Paylines	40	576	4096	117649	4096
Min bet	0.20	0.15	0.40	0.20	0.20
Max bet	40.00	30.00	20.00	20.00	20.00
Features
Progressive	✓	—	—	—	—
Wild symbol	✓	✓	✓	—	✓
Free spins	—	✓	✓	✓	✓
Scatter symbol	✓	✓	✓	—	✓
Multiplier	—	✓	—	—	✓
Bonus game	—	—	—	—	—
Respins	—	—	—	—	—

Every number is shown as a delta against Diamond Mystery - 40 Charming 7's.

Comparing against

Diamond Mystery - 40 Charming 7's

Greentube

RTP

95.48%

Max win

—

Score

777 Super BIG BuildUp Deluxe

+ Free Spins+ Multiplier− Progressive

+ Free Spins− Progressive

+ Free Spins− Progressive− Wild− Scatter

Jokrz Wild UltraNudge GigaBlox

+ Free Spins+ Multiplier− Progressive

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Diamond Mystery - 40 Charming 7's	Greentube	95.48%	—	—	49
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01What return to player (RTP) does Diamond Mystery - 40 Charming 7's offer?

You can expect an RTP of 95.48% when playing Diamond Mystery - 40 Charming 7's.

02Is it possible to play Diamond Mystery - 40 Charming 7's without registration?

A free version of Diamond Mystery - 40 Charming 7's is available — no registration or deposit required.

03Does Diamond Mystery - 40 Charming 7's work on smartphones or tablets?

Diamond Mystery - 40 Charming 7's works smoothly on both iOS and Android.

04Can I play and win cash on Diamond Mystery - 40 Charming 7's?

Absolutely — Diamond Mystery - 40 Charming 7's supports real-money bets and cash payouts.

05Is there a Buy Feature option in Diamond Mystery - 40 Charming 7's?

There is no Bonus Buy feature in Diamond Mystery - 40 Charming 7's.

06Does Diamond Mystery - 40 Charming 7's reward players with Free Spins?

No, Diamond Mystery - 40 Charming 7's does not have a Free Spins feature.

07Is the Megaways mechanic part of Diamond Mystery - 40 Charming 7's?

No, Diamond Mystery - 40 Charming 7's is not a Megaways game.

08Does Diamond Mystery - 40 Charming 7's have a progressive jackpot?

In Diamond Mystery - 40 Charming 7's, the progressive jackpot is built into its bonus features.

Series

Diamond Mystery

View all 13 games

Game	Year	RTP	Volatility	Slot Score
Diamond Mystery 40 Imperial CrownGreentube	2023	95.48%	Medium volatility	50
Diamond Mystery 10 Imperial Crown DeluxeGreentube	2023	95.48%	—	50
Diamond Mystery 20 Imperial Crown DeluxeGreentube	2023	95.48%	Medium volatility	53
Diamond Mystery 100 Imperial Crown DeluxeGreentube	2023	95.48%	—	51
Diamond Mystery Fruitilicious deluxeGreentube	2024	95.48%	Low/Medium	53
Diamond Mystery - 40 Imperial Crown deluxeGreentube	2024		—	40
Diamond Mystery Stars InfernoGreentube	2024	94.25%	Medium volatility	57
Diamond Mystery 100 Wild FireGreentube	2024	95.48%	—	55
Diamond Mystery Fortune StreaksGreentube	2024	95.48%	—	59
Diamond Mystery - 40 Charming 7'sCurrentGreentube	2024	95.48%	—	49
Diamond Mystery - Fruitful Frenzy - Cash AccumulatorGreentube	2025	95.48%	Medium volatility	56
Diamond Mystery - 100 Charming 7'sLatestGreentube	2025	95.48%	—	49
Diamond Mystery - 40 Charming 7's 6reelsGreentube	—		—	31