Gemstone Jam

A flat 96.00% is the return slot.report records here, landing 0.08 points beneath the 96.08% median we calculate from 9,226 games with published figures. Below the middle, in other words. Yggdrasil Gaming built it on three reels with fixed paylines and dressed it in a Gem theme.

Three reels, level-5 variance, no published ceiling

The swing rating is the part that refuses to fit the frame: 5 out of 5 on our scale, matching the "high" label from slot.report, on a three-reel layout. Expect gaps. Where a maximum payout figure would normally sit, our sources hold nothing — no stake multiplier, no cash cap — and we decline to estimate one from the variance rating. The same applies to the bet range, absent from the feed entirely. Megaways, bonus buy, jackpot and tumbling reels are all recorded as false. Yggdrasil contributes 135 games to our catalog, and this one arrived on 28 April 2026.

Players who like a stripped-down grid carrying a heavy swing. With no stake range recorded, the demo is the only way to see what a spin costs.

A 96.00% return leaves a 4.00% house margin, the single hardest certainty in this text. Play at 18+ only, within limits fixed before the session starts.