Gemstone Jackpot
Gemstone Jackpot

Gemstone Jackpot online slot from Greentube will appeal to those who are not indifferent to the beautifully crafted gems. Diamonds, emeralds, rubies, sapphires and other gems glitter on the reels of this slot game. In addition, if you are lucky, you can get huge payout coefficients – 500000 and 5000, and after any winning combination you may receive bonus “Lock and Spin”.

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Gemstone Jackpot online slot with bonus game

Rules of the gambling slot machine Gemstone Jackpot

In the casino game online free Gemstone Jackpot there are 5 reels slot and 10 playing lines. The control panel has three boards. On one of them, lines, although there are the buttons "+" and "-" are not in use: the number of active lines is always 10. The Bet/Line window (the rate on the line) is controlled by the same keys. The minimum bet per line is 4 (hence on the spin – 40), the maximum – 100 (which means the maximum bet size is 1000 credits). In the third place, the smallest window displays the total bet that the player has made.

There are three more boards located directly below the reels:

  • The credit (from the left) – shows the number of credits available to the player;
  • The last win – shows the last winnings;
  • The win – a large display in the central panel, showing the winnings for the last spin.

In the corners of the control panel in the bottom row are located the keys Start (on the right) and Autoplay (on the left). The first launches single rotation of the drums, the second launches an endless cycle of rotations. It will stop when the player won’t have enough credits to play at the current rate, or when the player presses the same button again.

Near the Auto play button is the Pay table key, which allows you to see the Paytable, and the game rules. If you click on it, then the inactive button Gamble next to the Start button is transformed into More Info button, which allows you to move between the pages of the rules.

In the demo mode, the player receives the initial credits for the game for free. On our site, you can play other slots free games.

Using two small buttons in the top right corner, you can disable:

  • The musical accompaniment;
  • All sound effects.

Symbols and coefficients on the game machine

All symbols of the slot video are depicted as faceted gems. They are seven types of them:

  • White;
  • Red;
  • Green;
  • Blue;
  • Yellow;
  • Purple;
  • Orange.

The winning combinations are formed of only three characters and only from the left to the right. The most expensive stones are the white ones (diamonds):

  • 5 of these stones at a maximum rate bring 50,000 multipliers of the bet;
  • 4 – 8000;
  • 3 – 4000.

There is also another version of the winning combination – when the identical stones filled the whole field, that is, on the drums appear 15 identical symbols. These combinations bring in ten times more than the usual winning combination of five stones. Thus, for the diamonds player gets 500,000, for rubies – 100000, for emeralds – 50,000, etc.

Lock and Spin Bonus

After each victory a bonus Lock and Spin becomes available. All winning combinations are locked on the reels and the remaining symbols spin again. In their place can be formed new winning combinations. Such spin is repeated until, the new winning combinations of icons is formed. You can learn about bonuses from casinos on "Bonus in Online Casino" section.

Risk game

After each win (after the single spin) on the casino slot machine the risk game is available for the player. In this case, the Gamble key becomes active, and the start button turns into Collect. With the help of this key the player can refuse to the risk the game and the gamble button is used to accept the offer. In the risk gаme, the player has to guess the colour of the suit of the cards, which will be taken from the deck. If the player guesses the colour, his win is doubled, and player receives a chance to make next attempt in the risk game. If the color is guessed incorrectly, the prizes disappear. In the Autoplay mode the risk game is not available.

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Game Specs
  • Automatic bonus Yes
  • Gamble Game Yes

How to win Gemstone Jackpot (cheats and tricks)

In any slot machine, your chances of winning pivot on RTP, the amount you have already spent and the amount you have won during the game. Besides, you should remember that, usually, a big win is 1,000 to 3,000 times the bet, so it makes no sense playing with a bet of 1 cent if you want to win more than USD 10–30.

So, in the following situations you will be better off doing as suggested:

Main rule:
  • Your prize per spin is 100 times the bet or more
Automatic bonus
  • You get automatic bonuses twice in ten spins
  • The automatic bonus wins you 50 times the bet or more
Risk game
  • Your current win is exactly half of what you need to get to stop the game — Keep on playing