What makes the Crystal Mirror stand out from the crowd is not only the extra reel (a standard slot has 5 reels, 20 paylines), but also the mirror reels feature. The game area is split into two parts of 3 reels each and they mirror each other. In other words, reels 1 and 6, 2 and 5, and 3 and 4 have the same symbols.
As for the symbols you will land on the reels, they are represented by low-value card suits, followed by better-paying gemstones. The slot has wild and scatter premium symbols as well. The purple gemstones are the wilds that act as symbol substitutes. The diamonds are the scatters that trigger the free spins.
The slot is a work in progress and some in-game details might be missing or incomplete. We will update this review once the Crystal Mirror goes live in August 2020.