Twice the Diamonds Slot

Review of the Twice the Diamonds Slot Machine

Having achieved significant success in brick-and-mortar casinos, the Twice the Diamonds slot machine is now accessible in a desktop and mobile-friendly version. This game features five reels and 30 paylines, showcasing playing card symbols, sparkling gemstones, and special bonus symbols.

In addition to wild substitutions, the Twice the Diamonds online slot provides players with free spins. During these free spins, escalating multipliers and locked wilds assist in forming lucrative combinations. By unlocking a gold key, players can win up to 8 times the base rate, or a total of 320 times their initial wager when combined with the best mix of symbols.

Experience the excitement of the beloved land-based game by playing the Twice the Diamonds slot machine at one of our reputable online casino partners today.

Unveil the Vault

A bank vault door gleams behind the reels, adorned with diamonds carelessly affixed by some workers on the outside. Although an unconventional setting, it looks visually appealing on PCs, mobile devices, and tablets.

In the online version of the Twice the Diamonds slot game, players aim to land three or more matching symbols across any of the 30 paylines, starting from the leftmost reel. The graphics are vibrant and colorful, albeit slightly dated, but winning symbols are accentuated with flashes of electricity to enhance the gameplay.

An elementary soundtrack betrays the slot’s origins in land-based casinos. Luckily, players have the option to mute the mechanical sounds, bells, and beeps. Alternatively, if preferred, they can crank up the volume to the maximum level.

The Twice the Diamonds online slot is developed by Ainsworth, an Australian game developer renowned for its extensive collection of slots and casino games available worldwide.

The Price of Diamonds

All 30 paylines are active, requiring a minimum bet of 0.04 units per line. Consequently, the initial bet per spin amounts to 1.20 units, making it a relatively high starting wager. Players interested in trying the game before placing real-money bets can enjoy playing Twice the Diamonds for free on this page. The maximum bet per spin is 48.00 units.

The paytable below illustrates the payout multiplier for each combination based on your line bet. Accumulated wins at a single time are added together, and players can expect to collect prizes easily in this low volatility game.

When playing the Twice the Diamonds slot online, players can expect an average return-to-player percentage of 96.51%. The frequent wins are, in part, attributed to the wild bank vault symbol, which substitutes for all symbols except the game logo to complete winning combinations, although it does not offer its own payout.

Reap the Benefits of Free Spins

Thus far, our review of the Twice the Diamonds slot machine has not revealed any surprises. However, the game logo serves as a scatter symbol that triggers a bonus round of free spins when landing in three or more positions simultaneously.

Prior to commencing the ten free spins, players receive scatter payouts worth two, ten, or 100 times their total stake from the triggering spin. Throughout the bonus round, different reels are utilized, with the wild symbol exclusively appearing on reels two and four. Additionally, a series of gold key multipliers are introduced on the central reel, each triggering distinct win multipliers.

Wild symbols remain locked in place for the remaining bonus games. Should a wild symbol contribute to a winning combination within the first four spins, while the 2x multiplier key is active, the prize will be doubled.

Winning combinations involving the wild symbol quadruple when the 4x key symbol is in play for the subsequent four spins. During spins nine and ten, the 8x multiplier key occupies the central reel in the Twice the Diamonds online slot.

Initially, this bonus round may sound exceptional. However, with the introduction of new symbols, the payouts from standard icons decrease, underscoring the importance of the multipliers in attaining top rewards. For instance, payouts from the gold and white diamonds amount to x3, x6, and x20 for landing three, four, and five on a payline.

Diamonds – Every Player’s Ally

The Deco Diamonds online slot from Just For The Win features classic fruit symbols, bells, and gemstones. This higher volatility game yields fewer winning spins, but the rewards can be substantial. Noteworthy features include respins with additional wilds.

In the Diamond Jackpots slot machine from Blueprint Gaming, players stand a chance to win a whopping prize of 10,000 times their stake. Similar to the symbols in the Twice the Diamonds slot game, this slot offers uncomplicated gameplay and falls within the medium to high variance range.

Is This Game a Gem?

The primary allure of the Twice the Diamonds slot machine lies in the potential for significant wins during the free spins round. However, while Ainsworth generously provides with one hand, they offset this by reducing payouts from standard symbols during the feature.

Fortunately, the game’s low volatility ensures that players won’t endure prolonged dry spells between wins. For individuals seeking a game with frequent payouts, trying out the Twice the Diamonds slot machine at our preferred Ainsworth casinos is highly recommended.

Jesse Miller iGaming Writer

Last Updated: October 5, 2025