Crystal Mine is an online game from Mancala Gaming slots. It has 25 paylines and five reels... with an RTP of 95% and high variance. The theme has been inspired by mining, and there are bonus features such as a wild symbol, extended spins, free spins and a bonus round.
- Can win up to 250 free spins
- Bonus game can quadruple winnings
- Excellent and engaging gameplay
- RTP is below the average
- High variance can be risky
Contents
Crystal Mine Review Introduction
Ever wondered what it’s like to go below the ground and find great treasures? In Crystal Mine you can experience just that! With 25 paylines and five reels to play on, you have the opportunity to win up to 10,500x your total bet with the maximum jackpot. Use the great array of bonus features on offer to make the gameplay more exciting and discover just what these crystals have to offer.
Overall Theme
This slot has a mining theme with great graphics and visuals. You will be transported into the mine that has atmospheric torches lit around the reels. The soundtrack matches the theme well. You can play something similar in the Crystal Sun slot if you enjoyed this title.

Crystal Mine RTP and Variance
The RTP of Crystal Mine is on the low side, which is a bit disappointing for an otherwise well-made slot. It sits at 95% when we would normally like to see a 96% RTP for online slots. The variance is high as well, which makes the game a little risky, with wins being rare but for higher amounts when they do land.
How to Play Crystal Mine
Playing the game is simple, but if you are new to online slots or are unsure how to play, take a look at our guide below.
- Set your bet by using the total bet controls.
- Use the coin button next to these controls to choose the highest bet amount possible.
- The large spin button spins the reels once for your chosen bet.
- The lightning bolt will make the reels spin faster.
- Click the smaller spin button above the main spin button to start the reels spinning on their own.
- The sound can be toggled using the speaker button in the top left corner.
- Next to this is the hamburger menu, where you can see the paytable and slot information along with your play history.
Bet Sizes & Paytable Wins
The bet sizes in Crystal Mine will suit a good range of budgets. You can choose to spend the minimum amount on the reels with a starting bet of 0.25 coins per payline. If you want to use the maximum amount, you will be betting 22.50 coins on the reels for every spin.
To see any sort of payout from this game, you will need to land symbols in winning combinations of threes, fours and fives across one of the 25 active paylines. Below we have detailed the multipliers you can win by landing five of each symbol group on the reels.
Orange, Green & Blue Crystals - 100x multiplier
Pink Crystal - 120x multiplier
Ginger & Black-Bearded Miner - 200x multiplier
Brown-Bearded Miner - 250x multiplier
White-Bearded Miner - 350x multiplier
Female Miner - 400x multiplier
Crystal Mine Bonus Features
Wild Symbol
It’s easy to spot the wild symbol because it’s a rock with the word wild painted across it. The wild symbol can substitute in for all other symbols in the game. This will help you to create more wins on the reels.
Extended Spins
If you see the arrow symbol on the middle reel, that reel will continue to spin until the arrow icon disappears. This extended spin will give you an boosted chance of landing a winning combination.
Bonus Game
You can trigger the bonus game by landing three of more of the dice symbols anywhere on the reels. When this round starts, you will get five opportunities to roll some dice. With every roll of those dice, players have the chance of winning money up to 35 coins, extra rolls or a 2x or 4x multiplier on wins in the game.
If you triggered the round with four dice symbols, you could be in with the chance of winning a 100 coin bonus. Five dice symbols means you could win the megabonus in the slot, which is 1000 coins.
For every -one dice you roll, you lose that number of dice rolls. You will end the bonus round when you have used up all of your rolls or the dice lands on a lose.
Free Spins
The free spins bonus works a little differently in Crystal Mine than your conventional slots. After every spin that doesn’t result a win in the base game, you will notice that you move on one space on the free spins meter. By the time you reach the third space on the meter, you’ll get a free spin.
A winning combination means you’ll lose all of the free spins you have accumulated so far. The further you can get on the meter, the more free spins you can win. If you manage to fill the entire meter, you get the maximum number of 250 free spins. Free spins can be used at any time during the game by clicking the use button.
Three losses - 1 free spin
Four losses - 3 free spins
Five losses - 8 free spins
Six losses - 15 free spins
Seven losses - 40 free spins
Eight losses - 100 free spins
Nine losses - 150 free spins
Ten losses - 250 free spins
Our Verdict
Overall we would definitely recommend this slot to a lot of online players. The gameplay is fun, and the bonus features add a lot to the experience.
Disclaimer: Crystal Mine trademark / license is owned by Mancala Gaming. This site is not endorsed by Mancala Gaming.
| Slot Name: | Crystal Mine |
|---|---|
| Software: | Mancala Gaming |
| RTP: | 85% |
| Paylines: | 25 |
| Reels: | 5 |
| Min Bet (all lines covered): | £1.00 (GBP) |
| Max Bet: | £89 (GBP) |
| Top Win: | 19599 |
| Features: | Bonus Game, Wild Symbol, Free Spins, 5 Reels |
| Themes: | Action & Adventure |
| Last Update: | 05/11/2021 |
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No. :maker does not have a UKGC license and cannot offer their games at UK licensed casinos. |
FAQs
What is the most I can win?
The maximum win is 10,500x your total bet.
How do I win 250 free spins?
You will have to have ten losses in a row to get 250 free spins.
How do I trigger the bonus round?
Landing three or more dice symbols will trigger the bonus round.
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