Diamond Staxx Review
Diamond Staxx is a glitzy gem slot where wilds lock in place during the bonus spins.
5×3 grid
Diamond Staxx plays on a 5×3 grid with 10 lines, paying from left to right.
Diamond Staxx Features
Bonus spins
Three stars on reels 1, 3 and 5 award 10 bonus spins, which can't be retriggered. Wilds stay locked for the whole round.
Bonus buy
The bonus spins can be bought for 79× the total bet.
RTP
GrandX doesn't list an RTP for this game, so it is unconfirmed here. Amatic games can run at different RTP settings; the game's info screen shows the one in use.
Diamond Staxx Pros and Cons
Strengths
- Locked wilds in the bonus
- Bonus buy
- Simple rules
Limitations
- No retriggers
- No published RTP
Our Verdict
Diamond Staxx is a clear, sticky-wild bonus slot; the 79× buy price is the key number.
Diamond Staxx FAQs
How much does the bonus buy cost?
79× the total bet.
How many lines does Diamond Staxx have?
10 lines.
What is the RTP?
It isn't published on GrandX; check the info screen in the game.
Sources and game-version notes
Information checked 1 November 2026.
Layout, lines, volatility and feature rules come from the game's page on GrandX, Amatic's online casino brand, checked on 1 November 2026. The page doesn't state an RTP, so it is marked unconfirmed; check the info screen in the demo.
