Jewel Boost Reels

Jewel Boost Reels is a fruit and gem slot from Mascot Gaming, released on 16 April 2026. It plays on a 5x3 grid with 10 lines, returns 96.24% at high volatility, and takes bets from 0.10 to 50. The top prize is 5,000x the bet. The game is built around expanding Wild Reels that trigger respins and stay sticky, with a Boost option to trigger them more often and a card gamble on top.

Gems On Green Felt

The design is clean and classic. The reels sit in a thin gold frame on a green background that looks like the felt of a casino table, and the “Jewel Boost Reels” logo in blue and gold, crowned with a diamond, sits in the top left corner. A banner above the reels changes between short rule reminders during play.

The symbols mix big cut gemstones in purple, red, green and teal with classic fruit: a watermelon, grapes, a lemon and an orange. The purple diamond is the top symbol, and the teal diamond shown in the rule banner is the special one that turns into a Wild Reel. Winning symbols explode in a shower of gold coins, and the line win is shown under the reels, for example “3x lemon pays 25.00”.

The controls sit on the right: a big spin button with a “hold to turbo” ring and two round buttons for Risk and Boost.

Wild Reels And Free Respins

Three short messages above the reels explain the whole feature:

“A diamond expands into a Wild reel and awards a Free Respin!”
“Wild reels become sticky during Free Respins!”
“Each new Wild awards an additional Free Respin!”

So when the special diamond lands, it grows into a full reel of gold, gems and jewellery with a big “Wild Reel” banner. The reel stays in place for a respin, and every new Wild that appears adds one more respin while the earlier ones remain. With only five reels and ten lines, two or three sticky Wild Reels can cover most combinations on the grid.

Why A Wild Reel Is So Strong

Every one of the ten paylines runs through all five reels, taking exactly one position on each. That means a reel that is completely wild is part of every single line at once. With one Wild Reel, any line that has matching symbols on the other reels around it pays; with two Wild Reels next to each other, a line only needs three matching symbols on the remaining reels to become a five-of-a-kind. That is why the sequences with two sticky reels in our screenshots paid so much more than the ordinary spins.

The Wild Reels In Action

Our screenshots show how strong this is. In one spin, Wild Reels on the second and third reels combined with watermelons, lemons and grapes for a 575 USD “Good Win” – 11.5x the bet.

The biggest result came later, again with Wild Reels on the second and third reels. The panel showed 9,810 USD for the sequence, and the balance stood at 20,015 USD, up from 10,670 a few spins earlier. At a total bet of 100 with Boost switched on, that is about 98x the stake – built from line after line of fruits and gems connected by the two sticky reels.

Line Wins

Outside the Wild Reels, the line wins follow a steep paytable. At a bet of 50, three lemons paid 25 and three grapes 35 per line. The purple diamond is in a different league: four of them paid 450 on a single line, and when two rows of purple diamonds filled the first four reels, four lines paid at once for a total of 1,800 USD.

Boost

The Boost button opens a simple offer: “Activate Boost to increase your chances of triggering Free Respins.” At a bet of 50 the Boost window shows 100.00 USD, and when it is active the bet panel shows 50.00 + 50.00 USD – so in practice each spin costs double, and a “Boost activated!” message appears under the reels.

Our biggest wins came with Boost switched on, but that is one session. Boost makes the Wild Reels arrive more often; it does not make every spin profitable, and at twice the cost per spin the balance can also fall twice as fast.

The Risk Gamble

After a win you can press Risk to try doubling it. The gamble screen shows fifteen face-down cards, and you need to pick a card higher than the dealer’s. The note at the top matters: “Card 2 is higher than Ace!” In our screenshot a 1,150 USD win was on the line with a possible win of 2,300 and a X2 multiplier; a K had already won against the dealer’s earlier cards, a 6 and a Q. You can collect at any time with the button on the right.

Our Session In Numbers

The balance in our screenshots tells the story of a high-volatility game. It started at 9,675 USD, moved to 9,710 and then fell to 9,280 during ordinary spins with small line wins. After the 575 USD Wild Reel win and a gamble it was back at 9,855, and with Boost switched on it reached 10,765 after the 1,800 USD diamond win. Then the double Wild Reel sequence arrived and lifted it past 20,000 – roughly doubling the balance in a single feature.

Mascot uses the same card gamble in other titles, such as Battle Loot: Hold and Win, where the rule that a 2 beats an Ace applies as well.

Who It Is For

Jewel Boost Reels is for players who like simple-looking slots with a powerful feature. The sticky Wild Reels can turn a single diamond into a big sequence, the Boost option gives you control over how often you chase it, and the gamble is there for extra risk. High volatility means long quiet stretches are part of the deal, so set a budget before switching Boost on.

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