Stellar Diamonds is a 5-reel, 25-payline cosmic fruit slot developed by Playtech, set against a swirling violet nebula where classic fruit symbols drift among stars and a radiant blue diamond cuts through the dark. Every reel carries its own Feature Icon overhead — a safe, an x2 diamond, free games, an x3 diamond and a prize wheel — and each diamond that lands strikes the icon above it, potentially unleashing that reel's feature. Blue Hot Zones, expanding Free Games reels, stacked multiplier wilds and four collectable Bonus Prizes turn a familiar fruit grid into a layered, feature-driven journey through deep space.
Beyond the Nebula: Where Fruit Machines Meet the Stars
Far past the outer drift lanes, where clouds of magenta and indigo gas fold over one another like slow-breathing tides, there is a region cartographers simply mark as the Stellar Field. It is not a place of planets. It is a place of crystals — vast, faceted formations that grew in the cold vacuum over unmeasurable ages, catching starlight and throwing it back in razor-sharp blue.
The old prospectors who mapped this stretch of sky spoke of it as an orchard rather than a mine. Something about the way the crystals cluster, ripening in slow rows, reminded them of groves back home: melons split open in the light, plums darkening, lemons and cherries hanging heavy. Over generations that imagery stuck, and the field's charts came to be drawn with fruit rather than coordinates.
Above each column of the field hovers a marker, a sigil left behind by whoever surveyed this place first. Prospectors learned that a diamond striking one of those sigils wakes it — a vault sliding open, a crystal doubling and trebling its brilliance, a wheel of light beginning to turn. Occasionally an entire column flares blue, charged and impatient, and then the field gives up its secrets far more readily than usual.
Reels, Paylines and Symbol Hierarchy
The base game runs across 5 reels and 3 rows with 25 fixed paylines, all wins paying left to right and only the highest combination per symbol being awarded. The paytable is led by the Diamond itself, followed by the red Seven, then the Bell and Horseshoe. Below those sit the fruit ranks: watermelon and grapes share the higher fruit tier, while orange, lemon, plum and cherries make up the base tier, each paying from three of a kind upward.
The Diamond Wild
The Diamond is the wild symbol and substitutes for all other symbols to complete the best available combination. Three or more consecutive wilds from reel 1 also carry their own dedicated payout, which is awarded instead of the substituted symbol win whenever it is the larger of the two. Crucially, every Diamond that lands also strikes the Feature Icon mounted above its reel and may trigger that reel's feature.
Reel Feature Icons
Each reel is permanently assigned one feature. Reel 1 holds the SAFE feature, reel 2 the x2 Diamond feature, reel 3 the Free Games feature, reel 4 the x3 Diamond feature and reel 5 the Prize Wheel feature. The icons sit in a row above the grid so the potential of each landing wild is always visible.
Blue Hot Zones
At the start of any base-game spin, a blue background may light up behind one or more reels, converting them into Blue Hot Zone reels. A Diamond landing on a Blue Hot Zone reel triggers that reel's feature instantly rather than merely having a chance to do so, making these highlighted columns the most volatile part of any spin.
Bonus Prizes and the SAFE Feature
Four Bonus Prizes sit beside the reels: GRAND, MAJOR, MINOR and MINI, with initial values of 100×, 50×, 20× and 10× the total bet respectively. Every Diamond landing on reel 1 or reel 5 may increment one of these values, up to a ceiling of five times its starting level, after which a win resets it. Bonus Prizes are awarded exclusively through the SAFE feature, where twelve safes are presented and picks reveal prize types until one has been matched three times.
x2 and x3 Diamond Features
Triggering the x2 Diamond feature fills every position on reel 2 with WILDx2 symbols, while the x3 Diamond feature fills reel 4 with WILDx3 symbols. Both act as wilds and multiply any win they join by 2× and 3× respectively. When both features fire on the same spin, wins containing both symbol types are multiplied by 6×.
Free Games
The Free Games feature awards 5 free games and expands the grid to 5 rows across 50 paylines. Throughout the round, reels 2 and 4 are permanently Blue Hot Zone reels, so any Diamond landing there immediately triggers the x2 or x3 Diamond feature, while reels 1, 3 and 5 cannot become hot zones and trigger no further features. Each +1 or +2 symbol appearing in view adds that many extra free games, and the round ends when the counter reaches zero.
Prize Wheel Feature
When triggered, reel 5 converts into a barrel-style wheel of Special Prizes. A single press of SPIN turns the wheel to award either the Free Games feature, the SAFE feature, or a cash-style multiplier of 5×, 8×, 10×, 15×, 25×, 40×, 80× or 120× the bet.
Buy Feature and RTP
The BUY FEATURE button offers direct entry into Free Games at a cost of 70× the base bet, subject to maximum total bet limits. Playtech states a theoretical return to player of 95.85% in standard bet mode and 95.83% when the feature is purchased. A Turbo Mode toggle and autoplay, including an until-feature option, round out the control set.
