Gemstone Mine

Gemstone Mine Slot Review

Torches burn in iron sconces either side of a carved stone wall, teal and orange crystals glowing in the gloom, a pickaxe leaning against the rock as if its owner stepped away a minute ago. Stakelogic‘s Gemstone Mine is at its best when it cheats you of that mine’s whole promise: nearly every wall you break open in the base game is rebuilt by the next spin, and only the bonus lets you keep what you’ve dug. That makes it a strange design for a game sold on excavation.

The numbers are solid if unspectacular: a 95.98% RTP, high volatility, a 7,500x win cap and a 7-column grid that starts 6 rows deep and opens further as you play. It sits in the studio’s range alongside Bison Blocks, another game fond of things hidden in rock, and Devil’s Trap. The rest of this sets out how deep the digging actually goes.

Cascades and Cluster Pays

Wins are clusters, not lines. A symbol joins a cluster when it lands vertically or horizontally next to a matching one, and a cluster needs five or more of the same symbol to pay. Winning symbols are then removed, new ones cascade down, and the chain keeps going until no new win forms.

Coinciding clusters add together, and only the highest win per cluster counts. There’s no wild anywhere in this game, which is unusual for a modern cluster slot. What you get instead is a sheet of seven crystals and rocks, paying as multiples of the total bet:

• Blue Crystal – 5 pays 0.6x, 6 pays 0.8x, 7 pays 1x, 8 pays 2x, 9 pays 2.5x, 10 pays 5x, 11 pays 7.5x, 12 pays 15x, 13 pays 25x, 14 pays 50x, 15+ pays 150x
• Purple Crystal – 5 pays 0.4x, 6 pays 0.6x, 7 pays 0.8x, 8 pays 1.5x, 9 pays 2x, 10 pays 4x, 11 pays 6x, 12 pays 12.5x, 13 pays 20x, 14 pays 40x, 15+ pays 80x
• Orange/Red Crystal – 5 pays 0.3x, 6 pays 0.4x, 7 pays 0.6x, 8 pays 1.25x, 9 pays 1.5x, 10 pays 3x, 11 pays 4.5x, 12 pays 10x, 13 pays 15x, 14 pays 30x, 15+ pays 60x
• Yellow-Green Rock – 5 pays 0.25x, 6 pays 0.35x, 7 pays 0.5x, 8 pays 1x, 9 pays 1.25x, 10 pays 2x, 11 pays 3x, 12 pays 5x, 13 pays 10x, 14 pays 15x, 15+ pays 30x
• Light Blue Crystal – 5 pays 0.2x, 6 pays 0.3x, 7 pays 0.4x, 8 pays 0.75x, 9 pays 1x, 10 pays 1.5x, 11 pays 2.5x, 12 pays 3.5x, 13 pays 8x, 14 pays 12x, 15+ pays 25x
• Purple Rock – 5 pays 0.15x, 6 pays 0.25x, 7 pays 0.3x, 8 pays 0.5x, 9 pays 0.75x, 10 pays 1.25x, 11 pays 2x, 12 pays 3x, 13 pays 6x, 14 pays 10x, 15+ pays 20x
• Orange Rock – 5 pays 0.1x, 6 pays 0.2x, 7 pays 0.25x, 8 pays 0.4x, 9 pays 0.5x, 10 pays 1x, 11 pays 1.5x, 12 pays 2.5x, 13 pays 5x, 14 pays 8x, 15+ pays 15x

The ladder climbs in single-symbol steps, so every extra crystal in a cluster is worth something. Even so, the top symbol needs fifteen or more in one connected group to reach 150x.

That tells you how the base game paces: small clusters, frequent cascades, and the real weight sitting elsewhere. A five-symbol win of the best crystal returns 0.6x the total bet, which covers the spin and not much else.

Multiplier Symbols Behind the Blocks

The edges of the grid start blocked off, and that’s where the game hides its edge. Behind those sealed positions wait the multipliers, stashed around the frame’s outer reaches. The sequence for freeing one runs like this:

• A winning cluster lands next to a block and damages it, slightly revealing the multiplier symbol behind it
• A further win adjacent to the damaged block breaks it open and awards the multiplier’s value
• The freed position then accepts new symbols landing during the cascades

The multiplier value displayed on the symbol multiplies the total win. Several multipliers in one chain add their values together rather than multiplying each other, which keeps the arithmetic honest. The possible values run:

• x2, x3, x4, x5, x6, x7, x8, x9, x10
• x12, x15, x20, x25, x30, x50, x75
• x100, x200, x500

In the base game, blocked positions reset every spin, so any damage you do is undone the moment the reels stop. The base game can pay, but it never builds. Blocks you spent a whole cascade breaking open are sealed again on the next spin.

Free Spins Bonus

Dynamite scatters land anywhere on the reels, and four of them award 10 free spins. Five awards 15, and six awards 30. Three or more bonus symbols landing during cascades add 5 extra spins, so the round can grow past its starting count.

What changes is the reset rule. During the whole bonus, blocked positions with multiplier symbols never reset, so every block you break stays broken and every multiplier you reveal stays in play.

Multiplier values are added up and applied to the total free spins win. A long round with several blocks opened can stack serious value into a single closing payout. Free games run at the bet of the triggering spin, and the 7,500x win cap applies to the base game and the bonus alike.

Super Stake and the Buy Feature

Super Stake is a toggle you switch on before spinning. Activation costs 0.25x the bet and places more scatter symbols on the reels, doubling the chances of triggering free spins. It doesn’t touch the paytable, so you’re paying purely for trigger odds.

The free spins round can also be bought outright, in two flavours:

• Buy Bonus – 100x bet for 10 free spins
• Super Bonus – 250x bet, starting with every block already damaged and all multiplier values slightly revealed

The Super Bonus is the interesting one, because it removes the thing the base game makes you earn. Starting with damaged blocks means the multiplier-reveal engine is live from the first spin, rather than three or four cascades in.

At two and a half times the standard buy price, it’s positioned as the premium route. On a game whose bonus is entirely about opened blocks, that premium buys the whole point.

Our Honest Verdict

Overall Rating: 7.1/10

Most of the time you’re down here chipping at the same wall the mine sealed back up on the last spin, and small cluster wins pay for the candles. The reason anybody picks this shaft is the one place it stays open: the bonus, where the tunnel you dig is still dug ten spins later. That’s the whole charm, and it’s a real one.

Its strength is that sticky bonus. Because revealed multipliers hold for the entire round, a good one compounds spin after spin in a way the base game flatly refuses to, and a thirty-spin trigger can turn into something memorable.

The weakness is the ceiling. 7,500x is thin for high-volatility cluster play, and the paytable underneath it is humble, so the game is never going to feel rich even when it’s being generous. If you like watching a round accumulate, this is an easy mine to love; players who measure a slot by its biggest possible day will find the seam runs shallow.

Gemstone Mine FAQs

• What is the RTP of Gemstone Mine?

  The RTP is 95.98%.
• Is Gemstone Mine high volatility?

  Yes, Gemstone Mine is a high volatility slot.
• What is the grid size of Gemstone Mine?

  The game shows 7 columns by 6 rows of symbols, with two additional rows below, making a 7×8 frame in total. It’s described as an expanding grid slot, though the exact dimension change isn’t stated.
• Can you buy the bonus on Gemstone Mine?

  Yes. The free spins round can be bought for 100x bet, which awards 10 free spins. A Super Bonus option costs 250x bet and starts the round with all blocks damaged and multiplier values slightly revealed.
• How do the multiplier symbols work in Gemstone Mine?

  Multiplier symbols are hidden behind blocks on reels 1 and 8 and rows 7 and 8. A win adjacent to a block damages it, and a further adjacent win releases the multiplier’s value, which applies to the total win. Multiple multipliers add together, and their values range from x2 up to x500.
• Do the multiplier blocks reset in free spins?

  No. Blocked positions with multiplier symbols reset every spin in the base game, but they never reset during the entire free spins bonus, so multipliers you reveal stay in play for the whole round.
• When is Gemstone Mine released?

  Gemstone Mine’s release date is 28 May 2024.
• Who makes Gemstone Mine?

  Gemstone Mine is made by Stakelogic.