Gemstone Mine Slot

The Gemstone Mine slot is a dazzling expedition into a crystalline world, where players match sparkling symbols across a unique reel structure. Features include cascading wins, expanding reels for more combinations, and a range of gem-inspired bonus rounds that enhance the gameplay with extra excitement.

Play at King Casino

_{*Any values mentioned are subject to change.}

Gemstone Mine? Game Rules

Dig down in a deep journey with Gemstone Mine?, an expanding grid slot game set in a mesmerising underground world of radiant crystals deep in an abandoned mine. As you spin the reels and collect the crystals, the cave unfolds, revealing untold secrets and treasures. Delve deeper to discover the most powerful treasures. Will you reap the fortunes this old mine hides in Gemstone Mine??

Cascading Reels have symbols that fall down (cascade) onto the reels. When there is a winning combination on the Cascading Reels, the winning symbols disappear, and new symbols cascade down to fill the empty spots. New symbols continue to cascade down onto the reels until there are no new winning combinations.

The theoretical minimum payback percentage (RTP) is 93.79%

A malfunction of the virtual machine voids all plays and payments during the period of malfunction.

Only the highest win per cluster is paid.

A symbol becomes part of a cluster if it lands vertically or horizontally adjacent to an identical symbol; a cluster win requires a number of symbols according to the paytable to be part of the same cluster.

Winning symbols are removed, and symbols cascade.
Free Games are played at the bet of the game, which triggered the game.
Payouts have been multiplied by the current active bet.
Free Spins: retriggers are possible.

Disclaimer: If an interrupted game is not finished within 90 days, your game will be terminated. If your game gets terminated, you will lose every active bet.

Multiplier Symbols

Multiplier Symbols are hidden behind the blocks on the first (1) and eighth (8) reels and as well on the seventh (7) and eighth (8) rows.

Winning combinations adjacent to blocks can award multipliers. The first adjacent win slightly reveals the Multiplier Symbol, and a further win adjacent to the damaged block will award a Multiplier Symbol value.

After achieving a multiplier value, block positions become available for new symbols, landing during the cascades.

The multiplier value displayed on the symbol multiplies the total win.

When multiple Multiplier Symbols land, their multiplier values are added together.

Blocked positions with Multiplier Symbols reset every spin.

The possible values are: x2, x3, x4, x5, x6, x7, x8, x9, x10, x12, x15, x20, x25, x30, x50, x75, x100, x200, x500.

Free Spins Bonus

Free Spins Bonus symbols Scattered anywhere on the reels award Free Spins. 4 Bonus symbols award 10 Free Spins, 5 Bonus symbols award 15 Free Spins and 6 Bonus symbols award 30 Free Spins. It is possible to win more Free Spins during a Free Spins Bonus round.

Retriggers are possible:

If three (3) or more Bonus Symbols are landing during cascades then five (5) extra Free Spins are awarded.

During the Free Spins Bonus Game, Multiplier Symbols are added up and multiply the total Free Spin Win.

Blocked positions with Multiplier Symbols never reset during the entire Free Spins Bonus Game.

Super Stake

Activate Super Stake to double your chances of triggering Free Spins.

Super Stake activation increases the bet, but it does not increase the pay table.

While Super Stake is activated, more Scatter Symbols are placed on the reels, making Free Spins more likely to be awarded.

Activation of Super Stake costs 0.25 x bet.

Cluster Pay

Winning symbols are removed, and symbols cascade.

Payouts are made according to the pay table.

Coinciding wins on different clusters are added to the total win.

Win CAP of 7500 x bet for both base game and Free Spins.

Super Wheel?

The Super Wheel? feature is a side bet which has been designed to maximise the thrill and excitement of your entertainment. This Side Bet will give you the opportunity to be a part of an entertainment sensation through our Super Wheel? Live Studio experience.

With this fantastic feature, you will have a chance to win up to 5000 times your stake. On average, this feature triggers a winning combination approximately every 73.42 spins, based on its long-term hit frequency.

You may be awarded an Instant Win stake multiplier ranging from 10 x bet up to 200 x bet, there are a total of 3 Bonus Games which may be awarded from each Super Wheel? entry.

The average RTP for this side bet is 95,00%.

Only the Super Wheel bet will be carried out to the Super Wheel Bonus round.

Super Wheel bet is customised, and it increases your base bet.

This button will be displayed when the Super Wheel? side bet has not been activated.

This button will be displayed when the studio is offline, this will normally happen only once weekly.

The grey button will be displayed when you play any of our games in DEMO mode (if available); this Super Wheel feature will not be available during demo play.

Disclaimer: If an interrupted game is not finished within 90 days, your game will be terminated. If your game gets terminated, you will lose every active bet. A malfunction of the virtual machine voids all plays and payments during the period of malfunction.

Instant Win Multipliers

The Instant Win multipliers are placed on 40 segments of the Super Wheel?. Multipliers offer an award which will always be a multiple of your stake when you trigger the Bonus.

The possible multipliers for the Instant Win are: 10x, 15x, 20x, 25x, 30x, 40x, 50x, 75x, 100x and 200x bet.

Vegas Drops?

VegasDrops will see you transported to an exciting new Drops game where you will collect multiplier values, with an average win in this Bonus is massive 328.38x your stake and a max win of 2690x your stake.

All Symbols drop in from left to right at the top of the screen. Values will be presented as multipliers of your stake.

A re-trigger symbol anywhere in view will re-trigger the Bonus as and when any column has been filled. Only one re-trigger will be available during any game round.

The Bonus is over when an entire column has been filled with x10 cash values.

Re-Drop Symbol awards a re-trigger when a column is filled. The Re-Drop only triggers when it forms part of a full stack.

Any re-trigger will remove all existing values from the game view, and the feature will start again.

Gold R brick awards: Retrigger

Gold brick awards x101+
Orange brick awards: x51 to x100
Purple brick awards: x26 to x50
Blue brick awards: x11 to x25
Green brick awards: x1 to x10

Vegas Diamonds?

Vegas Diamonds gives you the chance to play one of the most popular and successful game mechanics in a generation with the chance to win massive multipliers and re-triggers throughout your gameplay experience; the average win in this Bonus is a whopping 199.99x your stake and max win of 5000x your stake.

The Bonus game begins with 8 Free Spins. The maximum cash return for any paying symbol will be 5000x your stake. Values will be displayed as multipliers on the chip symbols.

Every time 3 Gameshow Host Symbols are collected during Free Spins, it retriggers the Free Spins feature. You will be awarded with +2 Free Spins and x2 Multiplier. The next retriggers will be awarded as follows:

+2 Free Spins and x3 Multiplier.
+2 Free Spins and x5 Multiplier.
+2 Free Spins and x10 Multiplier.
+2 Free Spins and x20 Multiplier.

In the event where multiple Gameshow hosts are awarded from any single game round, any multiplier values will be transferred to each Gameshow host, this will increase the value of the multiplier by the amount of Gameshow hosts in the game, up to a maximum of 5 as the result from any single game round.

Gameshow Host: Collects all values and adds them to your multiplier bank.

Diamond awards: x51+
Gold Casino Chip awards: x26 to x50
Silver Casino Chip awards: x11 to x25
Bronze Casino Chip awards: x1 to x10
Sparse Reel Symbol

Vegas Hold’n’spin?

This Bonus game is a true classic putting you in a commonly played and hugely successful game mechanic. You will collect multiplier values from an initial 3 respins. When you are awarded a multiplier from any spin, it results in your response to restart back with 3, guaranteeing extended play. The average win for this Bonus is an amazing 100x your stake.

The maximum achievable win is 723x your stake.

The reels will be sparse and have a mixture of both diamonds with cash values and pips.

Pips are non-paying reel symbols which fill the gaps between paying reel symbols.

Reels will spin from top left to bottom right, starting on the top row and moving down to the bottom row right symbol position; this is where the game round will end for that spin.

If the player fills all positions on the reels, the game will pay out all collected values, and the Bonus game will re-start. The Bonus is over when 3 consecutive losing spins have been played.

Multipliers will range from x1 to x1000.

Diamond awards: x51+
Gold Coin awards: x26 to x50
Silver Coin awards: x11 to x25
Bronze Coin awards: x1 to x10

Play at King Casino

*All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time. Game features mentioned may not be available in some jurisdictions.