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Play Diamond Mystery - 40 Charming 7's™ for Free

Novomatic
Novomatic
3.8

139 Ratings

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Diamond Mystery - 40 Charming 7's™ Slot Review

Get ready to spin up some fruity fun with Greentube's Diamond Mystery - 40 Charming 7's™ slot machine. The game features 40 paylines, and vibrant fruit symbols light up the reels. Watch for the Diamond Mystery Feature and aim for the progressive jackpot of up to 5,000x! Each win comes with a rush of excitement. 

Game Info

Return to Player
95.48
Provider
Novomatic
Novomatic
Autoplay
Bonus Buy
Bonus Rounds
Cascading Reels/Avalanche Feature
Cluster Pays
Expanding
Free Spins
Gamble
Jackpot Slots
Megaways
Mobile
Multiplier Symbols
Mystery
Scatter Symbols
Spreading
Stacked
Sticky
Number of Paylines
40
Layout
Min Bet
0.2
Max Bet
40
Release Date
12/30/2024
Last Update
9/5/2025
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Bringing Back the Classic

Diamond Mystery - 40 Charming 7's™ online slot adopts a classic slot theme rooted in traditional fruit imagery. Moreover, the game has no background music. However, you'll hear feedback sounds as you hit the buttons and when the reels spin. 

As for the gameplay characters, the Diamond Mystery - 40 Charming 7's™ online slot features classic casino symbols. The orange, lime, and cherries form the lowest paying category, while the melon, plum, and grapes offer medium payments. You'll reap the largest payouts from the 7 Wild and Scatter combinations.

Fruity Rewards on the Menu

Greentube’s Diamond Mystery - 40 Charming 7's™ slot machine boasts a classic 5-reel, 4-row setup with 40 fixed paylines, medium-high variance, 95.48% RTP and a 14.85% hit frequency. You'll start spinning for as little as 0.20 credits per bet, and high rollers can crank up the excitement with up to 40 credits. While the top payout is a whopping 5,000x your wager, but the game awards the following returns from matching symbol combos on a payline:

Symbol
Three on a Payline
Four on a Payline
Five on a Payline
Orange, Lime, Cherries
0.25x
0.50x
2.50x
Melon, Plum
0.50x
1.00x
5.00x
Grapes
0.50x
2.00x
10.00x
7 Wild
1.00x
10.00x
25.00x
Scatter
5.00x
20.00x
500.00x

Special Bonuses for Optimal Rewards

The following bonus specials will give you an edge as you play Diamond Mystery - 40 Charming 7's™ slot online:  

Diamond Mystery™ 

The Diamond Mystery™ feature can trigger randomly even on a losing round. Once activated, players get to flip cards to reveal hidden jackpot gems. Three matching gems unlock the corresponding jackpot.

Jackpots 

Whenever you place a bet, 1% goes straight into the jackpot pool, but the prize will be proportional to your bet size if you’re lucky enough to win it. The beauty of a progressive jackpot lies in its ever-growing nature, fueled by the combined bets of all players. If a jackpot is triggered, the prize is taken from the pool and awarded to the lucky winner. The remaining funds carry over to future jackpots.

The first player to trigger the jackpot always claims the prize. This decision is based on time stamps. There are four jackpot tiers: the dazzling diamond jackpot pays out 5,000x your stake, and the red gem offers 1,250x. The blue gem gives 200x, while its green counterpart rewards 50x. There's no upper limit on how big these jackpots can grow.

Gamble Risk Game

You can gamble up to 500.00 based on your current bet for a shot at doubling your initial returns. However, the gambling option won't be available if you activate the Autostart function. Additionally, jackpot wins are off-limits for the gamble risk game.

More Ways to Fruity Experiences

Taste some more succulent experiences from fruity reels in the 40 Diamond Plus slot by EGT and the 20 Hot Strike Dice Jackpot slot by TipTop.

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