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International European casinos Australia Austria Belgium Brazil Brasil (PT) Canada Canada (FR) Croatia Czech Republic Denmark Estonia Finland France Deutschland Germany Ελλάδα Greece Magyarország Hungary India Indonesia Ireland Kenya Latvia Lithuania Malaysia Argentina Colombia Mexico Ecuador Peru New Zealand Nigeria Norge Norway Poland Polska Portugal Philippines Singapore Slovakia South Africa Spain Español Sweden Switzerland Thailand Netherlands United Kingdom Ukraine Japan Excellent 9.1 / 10
In Gemstone Mine by Stakelogic, crystals are flying around your ears. Multiplier symbols increase the values of crystals, making the prize money soar.
The mine of Gemstone Mine features colored crystals, both around and on the playing field. Through the cluster pays mechanism, you make winning combinations with crystal symbols, increasing the size of the playfield by removing stones. With a little luck, you’ll even trigger Gemstone Mine’s free spins feature.
Gemstone Mine is a cluster pays slot. That means in this case that you spin clusters of at least 5 identical symbols for a winning combination. These symbols must be horizontally or vertically adjacent to each other.
The playing field of this slot has dimensions of 8×8. At the beginning of each spin, however, only part of the playing field is active. The bottom 2 rows and the outer rollers are locked. At the start of a spin you play on a 6×6 playing field. With winning combinations, you unlock locked positions and expand the playing field. For that, a winning symbol must be adjacent to a locked symbol. But beware: because a position is only unlocked when a winning symbol lands next to it 2 times.
Winning symbols disappear from the playing field due to the waterfall mechanism. Empty positions replenish the game from above with new symbols. As long as new symbols continue to produce new winning clusters, a spin continues.
In our experience, you especially need multiplier symbols to win high prizes.
You play Gemstone Mine every spin with a bet of at least $0.20 and a maximum of $50. However, there is an optional super stake feature, which increases your bet by 25%. In return, it doubles your chances of triggering the free spins feature. Furthermore, Gemstone Mine has a high volatility, a maximum RTP of 96.11% and a maximum price of 7,500 times your bet.
Those multiplier symbols are hidden behind locked positions on the playing field. Thus, unlocking locked positions is of great importance. In addition, Gemstone Mine also has a free spins feature.
Good sides
Bad sides
You know that on an adjacent position you have to spin a winning symbol twice to unlock the locked position. At the same time, you also earn the multiplier that shows the multiplier symbol.
The minimum multiplier is x2 and the maximum multiplier is x500. The total of multipliers collected applies to the total winnings of the active spin. After a position is unlocked (and the multiplier is cashed out), regular pay symbols land on the relevant position from then on. At the start of a new spin, however, you return to the 6×6 playing field.
Once we managed to spin 4 dynamite scatters, triggering the Free spins feature of Gemstone Mine. The number of free spins can quickly increase:
By spinning 3 or more scatters during the free spins feature, you will earn 5 additional free spins.
The big difference with the base game is that the total multiplier does not reset between spins. Thus, over time, the total multiplier rises to great heights. In our experience, it therefore takes a while for the Gemstone Mine free spins feature to get going. Only with the last free spins does the prize money increase.
Gemstone Mine vs. 4 other slots from StakeLogic
| Slot name | RTP | Max. win | Bonus feature | Multipliers |
| Gemstone Mine | 96.1% | 7,500x | Free Spins | Yes |
| Diamond Staxx | 96.2% | 5,000x | None | No |
| Old Fellow | 95.6% | 50,000x | Free Spins | Yes |
| Wild Stocking | 95.5% | 25,000x | Free Spins | Yes |
| Pyramid Strike | 95.8% | 3,140x | Free Spins | Yes |
We do not think Gemstone Mine is an innovative online slot, but a very nice slot to play. The soothing design and the clear gameplay ensure a pleasant gaming experience. In addition, you regularly win great prizes.
On the whole, however, Gemstone Mine is a bit too neutral. The slot can therefore not match a similar game like cluster Tumble from Relax Gaming.
This slot does not operate with paylines. Instead, the pay mechanism is called Cluster Pays. Any cluster of 5 or more identical symbols generates a win.
Each casino has its own welcome bonus system and special features. To get the best free spins offers, you can check out our list of casinos that offer the best free spin choices for Gemstone Mine as well as many other online slots!
Yes, when at least 4 Scatters land in your field at the same time, this will earn you at least 10 Free Spins. The more Scatters, the more Free Spins.
Of course it is! Try your luck at Gemstone Mine slot machine in the safety of one of our recommended casinos. We suggest you take a look at our page dedicated to trusted casinos so that you can enjoy yourself with complete peace of mind.
| Software | Stakelogic |
| Slot Types | Megaclusters |
| Reels | 8x8 |
| Paylines | Cluster Pays |
| Slot Game Features | Avalanche, Bonus Buy, Cascading Symbols, Cluster Pays, Expanding reels, Free Spins, Scatters, Wild Symbol |
| Min. Bet | 0.20 |
| Max. Bet | 50 |
| Slot Themes | Gold Rush, Mining |
| Slot RTP | 96.1% |
| devices |    |
x15+ = 300.00
x14 = 100.00
x13 = 50.00
x12 = 30.00
x11 = 15.00
x10 = 10.00
x9 = 5.00
x8 = 4.00
x7 = 2.00
x6 = 1.60
x5 = 1.20
x15+ = 160.00
x14 = 80.00
x13 = 40.00
x12 = 25.00
x11 = 12.00
x10 = 8.00
x9 = 4.00
x8 = 3.00
x7 = 1.60
x6 = 1.20
x5 = 0.80
x15+ = 120.00
x14 = 60.00
x13 = 30.00
x12 = 20.00
x11 = 9.00
x10 = 6.00
x9 = 3.00
x8 = 2.50
x7 = 1.20
x6 = 0.80
x5 = 0.60
x15+ = 60.00
x14 = 30.00
x13 = 20.00
x12 = 10.00
x11 = 6.00
x10 = 4.00
x9 = 2.50
x8 = 2.00
x7 = 1.00
x6 = 0.70
x5 = 0.50
x15+ = 50.00
x14 = 24.00
x13 = 16.00
x12 = 7.00
x11 = 5.00
x10 = 3.00
x9 = 2.00
x8 = 1.50
x7 = 0.80
x6 = 0.60
x5 = 0.40
x15+ = 40.00
x14 = 20.00
x13 = 12.00
x12 = 6.00
x11 = 4.00
x10 = 2.50
x9 = 1.50
x8 = 1.00
x7 = 0.60
x6 = 0.50
x5 = 0.30
x15+ = 30.00
x14 = 16.00
x13 = 10.00
x12 = 5.00
x11 = 3.00
x10 = 2.00
x9 = 1.00
x8 = 0.80
x7 = 0.50
x6 = 0.40
x5 = 0.20
About the author
Kate Ko / Games editor
Kate joined CorrectCasinos' game team in the late 2021. She's here to find and review all new and upcoming slots titles, so you can just enjoy their free play.
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