Crystal Gems is a 5 reel, 25 payline jewel-themed slot from 2 By 2 Gaming. This bright and bold game comes with a randomly triggered pick me bonus round as well as a free spins feature where you can boost your wins by up to 4x courtesy of the added wild multiplier. Go mining for a jackpot from between 25p and £50 per spin.

As you’d expect from given its name, Crystal Gems is a shiny affair as far as visuals are concerned – set against a pale, purple, rocky backdrop, the reels include brightly coloured playing cards from A to 9 alongside orange, blue and red gemstones which award 15, 40 or 200 times your line bet if you land 3, 4 or 5 on a payline.

More lucrative is the green emerald which pays 20, 75 or 300x. Better still is the shimmering which diamond which awards 20, 80 and 400x. The top paying symbol is the wild – as well as replacing all other symbols bar the bonus scatter, it offers payouts of up to 2,000 times your line bet.

Crystal Gems comes with 2 bonus features. The first we’ll look at is the Crystal Mystery Bonus feature – triggered at random, it does just what you’d expect. Simply choose 1 of the crystals and you’ll win a cash prize.

Land 3, 4 or 5 of the mine cart symbol and you’ll trigger the Free Spin Bonus feature and can look forward to 8, 10 or 12 free spins. Your winning chances are boosted here thanks to the added wild multipliers. If these multipliers form part of a winning combination, that payout will be doubled, trebled or even quadrupled.

It’s possible to re-trigger more free spins so hope to see those carts slide into view. A bonus prize of 5 times your line bet is also awarded for every gemstone symbol that hits during the feature.

Crystal Gems is a simple, well-designed slot – it’s not overflowing with features but the free spins round is a good one thanks to the multiplier wilds. It’s not the easiest to trigger but can pay dividends if you manage to land some high value multipliers. Saying that, I much prefer NetEnt’s Starburst which is just brilliant.