Gemstone Jam Slot Demo - Free Play

The Gemstone Jam slot from Yggdrasil Gaming is a classic 3-reel game set on a TV gameshow stage, with cherries, BARs and diamonds across 9 paylines. It offers a maximum win of up to 10,000x the stake.

With wild diamond substitutions that double or quadruple wins, random reel nudges on non-winning spins and a full grid of wilds paying 10,000x, the Gemstone Jam demo delivers very high volatility gameplay in a stripped-back, traditional format.

This very high volatility slot has an RTP of 96.00% and is available on desktop and mobile. Try the Gemstone Jam free play version to explore its features risk-free.

The Gemstone Jam online slot uses a classic 3x3 grid with 9 paylines paying from left to right.

You can try the Gemstone Jam slot demo before playing for real money. Bets range from 0.10 to 10.00 per spin.

• Reels & Rows: 3 reels, 3 rows
• Paylines: 9 paylines
• Bet Range: 0.10 to 10.00
• Top Symbol: Diamond wild paying up to 2,500x the bet for a full payline (10,000x for a full grid)
• Platforms: Desktop, iOS, Android

Autoplay and Quick Spin settings are available where local laws allow.

The Gemstone Jam slot game features traditional slot machine symbols in a gameshow setting.

• Wild Symbol: Diamond substitutes for all other symbols. Doubles the value of any win with 1 wild, quadruples with 2. Pays 2,500x for a full payline.
• Premium Symbols: Red 7 (30x for 3), triple BAR (15x), double BAR (10x).
• Low Symbols: Single BAR (3x for 3), cherries (pay from just 1 on the grid: 0.5x for 1, 1.5x for 2, 3x for 3). Any mix of BARs pays 1.5x.

Wins are formed when matching symbols land across paylines. The paytable is visible on the main screen at all times.

The Gemstone Jam slot has no free spins, respins or standalone bonus rounds. Features are limited to wild multipliers and random nudges.

• Wild Multiplier: 1 wild in a winning combination doubles the prize. 2 wilds quadruple it.
• Full Grid Wilds: Diamonds filling all 9 positions award the 10,000x maximum prize automatically.
• Random Nudge: On non-winning spins, reels can randomly nudge up or down by 1 row. Does not guarantee a win.

The Gemstone Jam RTP is 96.00%, acceptable for a very high volatility game.

• RTP: 96.00%
• Volatility: Very High (Super High on Yggdrasil's scale)
• Maximum Win: 10,000x the bet
• Maximum Payout: 100,000.00 at max stake

Very high volatility means long stretches between wins. Some casinos carry lower RTP versions (94.00%, 92.00% or 90.50%), so check before you play.

This Gemstone Jam slot review highlights a classic 3-reel game that keeps things simple with just wild multipliers and random nudges.

Wild diamonds doubling or quadrupling wins can deliver significant payouts from a single spin. The 10,000x cap for a full grid of wilds gives the game strong top-end potential despite the minimal feature set. The gameshow setting with visible paytable and backstory adds personality to the traditional format.

The 10.00 maximum bet limits appeal for higher-stakes players.

Try the Gemstone Jam demo before playing at the best Gemstone Jam slot sites.