Royal Ruby FeatureStorm
- RTP
- 94.98%
- Volatility
- High
- Max win
- 13,920x
by Pragmatic Play · Released 10 Sep 2026 · Demo available

Answers come only from this game’s data. If the data doesn’t cover it, we say so.
Eternal Diamonds is a high-volatility slot from Pragmatic Play with 96.50% RTP in our data and a top win of 20,000x your stake. That RTP is 0.10 points above Pragmatic Play’s slot average of 96.40%. Our data tags it for big-win chaser and feature hunter players.
Features in our data: Bonus Buy, Jackpot, Progression.
No casino offers listed for United States right now.
Eternal Diamonds has an RTP of 96.50% in our data, which means a house edge of 3.50%. RTP is an average over millions of spins; casinos can choose between versions, so check the game’s info screen.
Eternal Diamonds is rated high volatility. Expect long dry spells between bigger wins. Our bankroll guide suggests about 400× your stake for a comfortable session.
The top win on Eternal Diamonds is 20,000x your stake, so £4,000 at a 20p bet. It is a ceiling that very few spins ever reach.
Yes, Eternal Diamonds has a bonus buy. Bonus buys are switched off in some markets, including Great Britain, so the option may not appear at your casino.
Eternal Diamonds is made by Pragmatic Play. Check the “Where to play” section on this page for casinos that accept players from United States, and whether the studio is available in your country.