Play 20 Diamonds for Free

There are many video slot machines out there with grand themes and exotic designs, taking players to each and every corner of the world and beyond. This game, on the other hand, gives players the chance to relax with a nice and straightforward theme without compromising on the visual wow factor. With a set of shining jewels on the reels, including rubies, sapphires, amethysts, emeralds and diamonds, this slot machine promises a visual spectacle of colour and light, which will satisfy a universal audience.

Colour and light is certainly delivered, especially since a winning combination of gems will cause the images to become radiant and glowing. However, it all seems a bit too much – almost as if there is too much detail and shininess to the extent that the stones end up looking a bit fake and plastic. Perhaps the fact that this game is meant to be played on smaller screens, such as on mobile phones and tablets, has hindered the effectiveness of the visual aesthetic.

As one of EGT's “Touch” games, 20 Diamonds is specially adapted for mobile gameplay thanks to a de-cluttered control panel and series of touchscreen menu options. As such, spinners will have to tap the cog icon in the top left hand corner of the screen in order to access the wagering options, where it is possible to choose from 5 different bets – 20, 40, 100, 200 and 400. This is quite a small range of stakes to play around with, and it doesn't give conservative spinners much scope to play some safe spins. So, you will have to be fairly committed to parting ways with large chunks of your balance if you want to play this game.

This slot machine has 20 permanent paylines, meaning that there is a relatively good balance between the frequency of wins and the size of rewards. In fact, simply finding three of the game's least valuable gems on a payline going rightwards from the first reel will pay a line bet multiplier of 10x. And from there, the only way is up. You can see all of the winning combinations for standard paying symbols below with their corresponding line bet multiplier values.

This mobile optimised slot machine doesn't boast any big bonus features, but it does give spinners a bit of assistance with a couple of special game symbols. The first of these is the jewel encrusted lucky 7 symbol, which plays as a wild icon to complete winning lines in place of other symbols. What's more, five of these symbols in a row rewards the biggest line bet multiplier value of 1,000x.

The only symbol that cannot be replaced by the wild number 7 is the scatter symbol – depicted by a green, yellow and blue star. This image doesn't need to appear on any particular payline to reward spinners. In actual fact, finding five of these stars on each reel on one spin will pay a total bet multiplier of 500x. This, dear spinners, will turn a 400 credit maximum bet into a whopping jackpot of 200,000 coins.

No matter how lucky you are, you're very unlikely to make wins like that with every spin. However, you can boost your small wins with a quick and easy gamble. Simply guess whether a turned down playing card is red or black and you could double your wins from the qualifying spin. All incorrect gambles will result in the winning amount being lost and you will go back to the main game with nothing to show.

In truth, there isn't anything truly brilliant about this jewel-themed slot machine. The bonus elements are ho-hum and generic, while the graphics themselves don't really do justice to the theme. Nonetheless, there is a decent range of payouts within this mobile-based slot which could turn players bets into big wins as they go about their day-to-day business.