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Boomerang Jack’s Lost Mines Slot

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This slot game takes you to Australia, deep in the Kalgoorlie Mines to search for gems that may help you unlock 7 epic features and a top potential prize worth up to a golden 4,836x your wager!

*Any values mentioned are subject to change.


Boomerang Jack’s Lost Mines Slot Game Overview

The Boomerang Jack’s Lost Mines slot game is set in the great mine known as the Kalgoorlie Mine in Australia, where you may discover 3 additional hidden mines, which can offer more potential rewards. 

It is a 5-reel and 3-row slot game with 25 – 50 paylines. It has medium to high volatility and offers a maximum potential payout of up to 4,836x your stake. 

Symbols that can appear on the reels include playing cards A – 10, koalas, kangaroos, crocodiles, and carts full of gold. 

Features include possible Free Spins bonus rounds, which include Gem Coins, Diamond Wins where you could win 1 of the 4 Jackpots, Expanding Reels and combined features with 2 or 3 different Gems.

You can play this slot game here at the real money online casino, King Casino, using any device, including smart mobile phones and laptops. 

How To Play Boomerang Jack’s Lost Mines Slot

Boomerang Jack’s Lost Mines is an entertaining online slot game and can be relatively easy to play. But if you need help getting started, you can follow the short steps below;

  • Log in to your King Casino account, or join if you need to become a member.
  • Search for and load the Boomerang Jack’s Lost Mines slot.
  • Place your preferred bet using the “+” and “-” buttons below the reels. Stakes range from a minimum of £0.10 up to a maximum of £10 a spin.
  • To access the paytable and any additional information you may need, click on the “Paytable” button below the reels on the far left.
  • When ready, press the Spin button to start spinning the reels!

Winning combinations can be formed by landing 3 or more matching symbols on adjacent reels starting from the leftmost reel, across a win line. However, the high-paying cart of gold can award possible wins for just 2 identical symbols. If you land more than 1 winning combination on a payline, only the highest win will be paid out.

Special symbols include Wilds, Gem Coins and Gem symbols.

Wild Symbol

The Wild symbol can help you complete potentially winning combinations as it can replace other regular paying symbols, save for the special symbols. However, Wilds can only land on reels 2 – 5.

Gem Symbols

There are 3 different Gem symbols – green, red and blue. If 1+ Gem symbols land, it may randomly unlock the corresponding Free Spins bonus.

It is possible to activate 2 or 3 different bonus features. If this happens, you could win a Free Spins feature with combined features.

Green Gem Coins Feature

If 1+ Gem Coin lands during the base game, you could unlock the Gem Coins feature and win 5 Free Spins.

Any green and gold coins that appear during the bonus round can award a win, and the original value of the coin is x2 the current bet.

If additional Gem Coins appear during the feature, they can award an extra spin and increase the coin value.

Red Gem Coin Diamond Wins Feature

Landing the Red Gem may trigger 8 Free Spins. During the spins, you may land Treasure Chest symbols that can display a potential cash prize or extra Free Spins. 

In addition, you may also land different coloured diamonds – green, red, purple or blue. If these land, they get collected into their corresponding panel. If you fill a colour panel, you can win the corresponding Jackpot prize!

You could potentially win more than 1 Jackpot during this feature.

  • Mini – 10х your stake
  • Minor – 30х your stake
  • Major – 150х your stake
  • Grand – 700х your stake

Blue Gem Coin Expanding Reel Feature

Landing a Blue Gem may trigger 5 Free Spins playable across a 5×5 grid with up to 50 paylines.

Combined Features

The Combined feature may trigger if you land 2 or more different gems at the same time during the base game. If that happens, you may trigger all the features that correspond with the triggering gems. 

If you trigger 2 features, you can win 8 Free Spins, while 3 combined features can win you 10 Free Spins!

Return To Player

Return to Player (RTP): 95.30%

RTP is used to explain the potential money that an online slot or casino game can pay back to players. It appears as a percentage and is generally calculated from gameplay over a long duration of time.

For example, if a slot has a RTP of 97% this means that it could pay back £97 for every £100 wagered.

However, there is no guarantee that players will receive this amount, as slot payouts are entirely random.


*All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time.