Before you load Blue Diamond for real, spend a couple of minutes on how it genuinely performs. This is a Good Star slot game, sitting firmly in the a medium high-variance maths model bracket and paying back 95.76% RTP. Dating back to 2024, it remains a regular pick. The maximum win sits at 5,000x, so there's serious upside on the table. You get 5 reels and 15 paylines, all themed around gem. The full verdict is below.
Written by Alex Crawford · Last updated: February 2026
This slot, Blue Diamond, is the work of Good Star, themed around gem. It runs on 15 paylines across 5 reels with a medium high-variance maths model, and a published RTP of 95.76%.
Where Blue Diamond earns its keep is the feature set. Look out for scatter symbols that unlock free spins and extra bonus rounds. The medium high volatility strikes a middle ground that should suit most playing styles. Overall it's a well-rounded slot that knows what it is.
At 95.76%, the RTP is slightly below the industry average of ~96%. While this is typical for many popular slots, players should be aware of the slightly lower theoretical return.
Medium-high volatility means wins come less frequently but tend to be larger when they hit. Players should be prepared for dry spells between bigger wins, requiring a moderate bankroll.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Blue Diamond features scatter symbols that can trigger free spins rounds. Landing the required number of scatter symbols anywhere on the reels activates the free spins feature, giving you extra chances to win without additional bets. During free spins, special modifiers may apply to boost your winning potential.
3.0 / 5 — Good
Blue Diamond by Good Star is a solid offering that delivers good entertainment value. The 95.76% RTP combined with medium high volatility creates a well-balanced gaming experience.