About gem and jewel slots
Gem slots use diamonds, rubies and crystals as symbols, and the theme suits both simple classics and modern cluster or cascading grids. A sparkling look tells you nothing about how often a game pays.
Use the volatility and max win columns to tell the calm games from the volatile ones.
RTP of gem and jewel slots
The highest headline RTPs among gem and jewel slots are Reel Gems by Microgaming (97.49%), Diamond Strike by Pragmatic Play (97.02%) and Diamond of Jungle by BGaming (97.01%). The average headline RTP across all 120 is 96.15%, and the lowest is 93.77% on Crystal Skull Dice.
21 of them (18%) are published in more than one RTP version, so the return depends on the version an operator runs. The widest gap is on Frozen Gems: from 96.36% down to 84.25%.
Volatility and max win
Volatility is published for 80 of the 120 games: 7 low, 24 medium, 33 high and 16 very high.
The largest published max wins are 48,000× on Drago - Jewels of Fortune, 24,473× on Diamonds Up and 15,000× on Crystal Quest: Arcane Tower. The median max win of the 34 games that publish one is 4,168×. A max win is a rare ceiling, not a result to expect.
Studios, years and free demos
14 studios make the games in this list. The most represented are Pragmatic Play with 32 (average RTP 96.53%), Red Tiger with 16 (average RTP 95.87%) and Play'n GO with 15 (average RTP 96.27%).
Release years run from 2012 to 2026; the newest are Triple Pot Diamond (2026), Emerald King - Wheel of Wealth (2026) and Eternal Diamonds (2026).
98 of the 120 (82%) have a free official demo that runs on their page with no sign-up.