Gem-Themed Slots

When you think about classic slot themes, you may think of ancient worlds, fruity symbols, and traditional Irish visuals, but gems and jewels remain one of the most popular categories. Glistening symbols pepper the reels as you play your way into a trove of potential payouts, reminiscent of old-school machines but usually complete with more modern features and mechanics.

These slots are immensely well-liked, but what is it about them that makes players enjoy them so much?

Visuals, sound effects, features, and even game providers make all the difference, and we’ve covered them all in our guide to gem slots.

Play Gem-Themed Games at 21.co.uk Online Casino

Premium Symbols in Gem Slots

Naturally, top-paying symbols in gem-themed slot machine games are designed around the theme, offering luxurious icons that could land across paylines or in cluster formations to award payouts. Premium symbols offer bigger potential payouts than those lower down in the paytable, so keep your eyes peeled for some of the following jewels.

  • Emerald
  • Peridot
  • Ruby
  • Amethyst
  • Topaz
  • Sapphire
  • Garnet

Standard Symbols in Gem Slots

The standard symbols on offer in a gem slot are largely similar to any other theme, but generally, they are given a luxurious makeover to tie them in nicely with the rest of the game.

Card values are one of the two most popular options for low-paying symbols among all types of slot machine games, notably jewel-themed ones, but only a handful of card values are usually covered:

  • King
  • Queen
  • Joker
  • 10
  • 9

French card suits are the second of the common standard symbol sets, often with a glimmering upgrade to resemble a gemstone:

  • Spade
  • Diamonds
  • Hearts
  • Clubs

Popular Gem & Jewel Slots Game Developers

Big Time Gaming: Renowned for their innovation, with their slots hosting some of the industry’s most impressive mechanics & features. Packing plenty of helpful extras into their gameplay offerings, Big Time Gaming excels at creating unique gem slots. Take Star Clusters, for example, awarding payouts of up to 23,960x for clusters of shimmering gems along with increasing multiplier wilds and free spins to be won.

Red Tiger Gaming: Red Tiger Gaming is an industry favourite for its stunning graphics and quirky themes, broaching some unexpected topics in a lighthearted way. Gems Gone Wild is just one of Red Tiger’s gem-themed slot games available, with visuals that are out of this world.

Top Gem Slots Bonus Features & Mechanics

Free Spins

Like in most other themes, free spins are a hot commodity in gem slot games. Often triggered with scatters, this feature offers a tide of gems and jewels that cascade into view without costing you an extra penny. These bonus rounds are valued at the triggering stake, so your free spins are just as valuable as your base game ones, granting you lots of extra chances to pocket valuable gemstones.


Multipliers could show up as you play through the reels of your favourite gem slots, boosting the value of any glittering payouts that occur in the affected spin. Some of these multipliers present as wilds, simultaneously substituting for the other paying symbols in the paytable and enhancing the prize amount if they contribute towards a win.


Cluster-based titles bring a modern touch to the gemstone genre, offering payouts and prizes galore for shining clusters of matching icons. Usually, it’s at least 5-of-a-kind that are required for a cluster to qualify for a prize. Naturally, the more symbols in a cluster, the better.

Giant Symbols

What’s better than a standard-sized ruby? An enormous one! Giant symbols take over the reels, filling multiple positions to increase your likelihood of bagging a win or two. Generally, these supersized icons are selected at random, growing from the basic 1x1 size to 2x2 or even bigger, depending on the game!

Best Gem Slot Games

Great Gems - A Gleaming Payline-Packed Option: Cayetano Gaming’s Great Gems slot offers a wealth of ways to win, helping solidify its position as one of the best gem-themed slot machines available online here at 21.co.uk.

Starburst - A Gem-Themed Classic: We couldn’t recommend gem slots without mentioning the well-loved Starburst slot, a colourful and shimmery addition to our catalogue of jewel-themed games by NetEnt.

Gronk’s Gems - A Mythical Twist on the Gem Theme: Uniquely, Gronk’s Gems seamlessly blends together a mythical theme with the gems and jewels genre. With this interesting twist, our selection of gem slot machines features it as one of our favourites, and it’s well worth a go for its progressive multiplier.

Take Time to Think | BeGambleAware.org | 18+

We're sorry!

Unfortunately, 21 isn't available in your country.