Only Diamonds Slot by Gamzix

No regular symbols here. The base game grid sits empty except for diamonds that drop in randomly, and those diamonds don't pay anything until the bonus triggers. The cross-shaped layout - three positions on the outer reels, five in the center column - gives you 11 total spots, and the middle horizontal row of three is the only one that matters outside the bonus. Fill that row with diamond symbols on a single spin and the Hold the Spin round starts. Or a diamond landing on the middle row randomly activates Heap of Diamonds, which scatters enough symbols to force the trigger.

Inside the bonus, every diamond that lands carries a value between 1x and 9x your bet, and the top and bottom positions on reel 2 are restricted to high-value outcomes only - 9x diamonds, jackpots, Mystery, or Collect. The Collect diamond (orange, swirling) is the payoff moment. It reveals any Mystery values first, then sweeps every diamond's value off the grid from left to right. When two Collects land in the same round, the second waits for the first to finish before running its own sweep - so every value generated by the first Collect is gone before the second one fires. The Upgrade diamond (blue, lightning bolt) bumps every diamond on screen up one grade: a 3x becomes 4x, a 9x becomes Mystery Jackpot, and Mini becomes Minor. Major stays at Major. After upgrading everything else, the Upgrade symbol reveals its own 1x-9x value. Stack an Upgrade before a Collect and the chain gets interesting.

Four jackpot tiers sit along the left edge against deep royal purple felt - Grand at 500x is only awarded by filling all 11 positions, which also ends the round. Mini through Major (10x, 20x, 50x) come from jackpot diamonds or Mystery reveals. The 75x Super Bonus buy skews the symbol pool toward higher values compared to the standard 30x entry, and both options run at a noticeably lower return than the base game. Clean, saturated gem colors against the purple backdrop - white diamonds with gold-etched values, green jackpot stones, the orange Collect and blue Upgrade giving the grid its only visual punctuation.