Quartz SiO2

by Lady Luck Games

Sometimes the best online slots happen to be the most straightforward that focus on a simple concept such as black stones which is the case in Lady Luck Games' Quartz SiO2.

However, it should be noted that these black stones aren't your average ones as there may be fortunes hidden inside waiting for you to collect through wilds and respins.

Slot information

RTP: 95.90%
Volatility: Medium-High
Max Payout: 250x stake
Reels: 5
Paylines: 10
Jackpot: No
Min Bet: 0.05
Max Bet: 30.00
Theme: WTF
Release Date: September 2019

Our rating

“ A hidden gem of a slot that's absolutely mesmerising to play ”

3.9 out of 5

Win potential

Play Quartz SiO2

Jump straight into the action and play Quartz SiO2 now at the following fully licenced UK slot sites. These slot sites have been thoroughly audited and reviewed by the team here at Slot Gods to ensure they offer an exceptional user experience, are trustworthy, safe, secure, and boast the best selection of online slots in their portfolio including Quartz SiO2...

Quartz SiO2 Screenshots

Quartz SiO2 Features

There are two main features within this slot including the expanding wilds and the respin which work together quite well. The wild lands on reels 2 to 4 and expands to fully cover the reel.

After this, it triggers the respin mechanic with the expanded wild. If you land one or two additional expanding wilds appear after the respin, then one more respin retriggered.

Like most Lady Luck slots, this one contains the gamble feature which is triggered after a spin and allows you to choose between red and black to gamble in order to gain double your winnings. However, it should be noted that there's the chance to lose it all and you can only gamble up to 4 times per round.

Quartz SiO2 - Wild


In this game, all the wilds end up expanding on the reels to lead to larger wins. They only appear on reels 2 to 4 and trigger the respin.

Quartz SiO2 - Respin


Once you land a wild, you'll trigger the respin mechanic. You can trigger another respin by landing one or two additional expanding wilds.

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Quartz SiO2 Review

It's often theorised that the most precious gems and rarest ones are found in the darkest places and usually hidden within black stones. This is the exact premise of Lady Luck Games' Quartz SiO2 as you play on a slot surrounded by black stones but these open up delivering solid wins to players.

Whilst the gameplay may seem straightforward, this WTF slot contains expanding wilds, respins and a gamble feature to double up your winnings. If you love original games such as Stunning Cube, then Quartz SiO2 is one to check out.


Despite having a simplistic style, there's a whole lot to unpack with the design of this slot. In the distance, you'll find yourself in a cave filled with black rocks but there are slight sparkles near them highlighting something more.

The actual symbols on the reels showcase cracking rocks and stone playing suit symbols that fit in well with what Lady Luck Games is going for. There also seems to be a science-fiction element to this slot with a pulse going through the symbols once you land a winning payline.

Similarly, the music is quite relaxing and comforting with keyboard noises mixed with synth sounds to create something calming but this does grow with spins building up suspense. Quartz SiO2 is a perfect example of keeping something minimalistic and fine-tuning the finer details.


It may seem a little complicated at first glance, but this slot couldn't be further from that. There are 5-reels with 10 paylines and it's clear to see where the paylines are and how they work. All the features are straightforward and self-explanatory once you trigger them.

Like most Lady Luck slots, you'll find the spin button at the bottom right along with the bet level and further information to the left side in case you need it.

Win Potential

Whilst the RTP may seem lower than average at 95.9%, we didn't experience any issues with the slot in our 400 spins and found it quite generous. Similarly, with the maximum payout, we gained a decent amount throughout our playthrough and were thoroughly satisfied by the end of it.

The maximum win is apparently 250x your stake which is low for an online slot but this may only be a problem for high rollers as it can be rewarding enough for casual players. It should be noted that the volatility is medium to high meaning that you should expect higher wins but at a less frequent rate.

Our Verdict

You'll be pleasantly surprised with Quartz SiO2 as it's refreshing to play and so mesmerising once you spin the reels to see rocks open up with wins. The overall design is fantastic and shows that sometimes the best course is something uncomplicated but the finer details are perfected.

Alongside the great design, the overall features and gameplay are engaging enough to keep casual players entertained and is the ideal starting point for newcomers to online slots. Now, the only downside is the low maximum payout, but we didn't find this a major problem whilst we were playing but it may put off high rollers.

Ultimately, we are happy to recommend this slot as it's a delight to play and is sure to keep you entertained.

Charlie Vogelsang
Reviewed by Charlie Vogelsang Last updated on

As the Content Manager at Slot Gods, Charlie is focused on staying on top of the latest slot releases as well as finding the most recent trends. She spends her day searching for the best slots to be reviewed as well as managing most of the content that you will find on the site. Whether it’s the latest slot review from Relax Gaming or a guide on a brand-new mechanic, Charlie will be sure to have it covered on Slot Gods.

Learn more about Charlie here

Play Quartz SiO2

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