Cool Jewels

The Cool Jewels slot by WMS Gaming does what most other online slots can't. It allows you to make wins both horizontally and vertically while also offering you extra winning opportunities through its Cascading Reels feature. As the four different wild symbols cause explosions across the screen and locked wilds, you'll be on the edge of your seat waiting to see what happens next. There's also a free spins feature that lets you enjoy as many as twenty free games plus an extra five with each bonus symbol that appears. Furthermore, each symbol that you destroy increases the cash values that can be won on the Pay Per Symbol meter.

More about the Software Provider

WMS Gaming makes online slots for casinos across the world. The company's history dates back to 1943 when it was first founded under the name "Williams Manufacturing Company" by Harry E. Williams and made pinball machines and video games. In the mid-1990s, WMS Gaming began to design slot games, leading to a string of successful titles including Giant's Gold, Spartacus – Gladiator of Rome, Montezuma, Star Trek Red Alert, Super Monopoly Money, Zeus III, Reel ‘Em In, Lunaris, KISS, and Black Knight.

Appearance and Sound Effects

Cool Jewels uses six reels and six rows of gem-themed symbols. On the right-hand side of the screen is a section which shows you how to create winning combinations using four or more matching symbols and by spinning wild symbols which remove certain symbols from the grid.
The game gives you the option to change the size of your bet to between 50p and £200, and also set the Bet Multiplier to between 1 and 400.

The Pay Per Symbol Meter to the left of the reels displays an increasing number of cash amounts, and the meter rises with each consecutive win. The Free Games Meter on the right-hand side shows how close you are to receiving free spins.

The wind chimes and bells that provide the music for Cool Jewels sit very well with the frozen landscape that forms the game's background.

Bonuses and Special Features

One of the biggest features of Cool Jewels is Cascading Reels. Every time you create a winning combination, the symbols used in that combination are removed, allowing them to be replaced by new symbols that have the potential to form another win and so on.

There are also four wild symbols – Shocking Wilds, Unstable Wilds, Persisting Wilds, and Shattering Wilds – that are activated by winning combinations and explode adjacent symbols or, in the case of the Persisting Wild stay locked on the screen until they reach the bottom of the grid.

To get your hands on eight, ten, fifteen or twenty free spins, you must destroy four, five, six or seven Bonus symbols respectively. And, for every Bonus symbol that's destroyed while your free spins are underway, you get five more free spins.


Cool Jewels uses six reels, six rows of symbols, and no paylines to speak of due to the game's unusual grid format and pay structure. It comes with an above-average RTP (Return to Player Rate) of 96.01%. The game allows you to form wins anywhere on the grid.

Mobile Compatibility

The game is designed to work with desktops, laptops, mobile phones, and tablets, and includes mobile-friendly game controls.

Our Verdict

The Cool Jewels slot is a great game to play on mobile devices as it's reminiscent of social games such as Candy Crush and Bejewelled, yet it also uses a popular feature of online slots – Cascading Reels - which makes it possible to form multiple wins from a single spin. The three different wild symbols also boost the prize-winning opportunities, as does the Free Spins Bonus. If you're looking for something a little different from the norm, Cool Jewels should fit the bill perfectly.