Greentube

Jewels and Gems

Greentube scratch-card game using gem matches and random multipliers

SlotRanker Score

/ 99

05099

The SlotRanker Score is calculated from the visible data below. It is not affected by affiliate deals, and it cannot be bought.

How this score is built

RTP

94.98%

return to player

Volatility

High volatility

variance

Max win

1,000×

top multiplier

Min bet

$0.20

per spin

Reels

grid

Player rating

4.5 ★

10 votes

DEMO Play free, no signup

Greentube

Embed on your site

4.5 / 5

10 ratings

User ratings are shown separately from the Slot Score unless stated otherwise.

Five weighted signals shape the composite. Four context signals refine ties. See how we rate for the full methodology.

Payouts & RTP6/10

RTP 94.98% → 6.0/10

Volatility9/10

high → 9.0/10

Win Potential6/10

x1000.00 (1000×) → 6.0/10

Features3.5/10

5 features → 3.5/10

Game Mechanics3.1/10

f=5 r=3 → 3.0/10

Context signals (tie-breakers)

Layout4/10

3x3 → 4.0/10

Bet Flexibility4/10

0.2–8 (×40) → 4.0/10

Provider Reputation5.5/10

provider avg 5.5 → 5.5/10

Popularity2.5/10

synthetic proxy → 2.5/10

Popularity blends real player search demand (~30 markets) with a catalogue-derived proxy; games without measurable search demand use the proxy alone. Not live play telemetry.

Cite this score

SlotRanker Score: 49 — Jewels and Gems by Greentube

https://slotranker.com/greentube/jewels-and-gems#score

How to cite

Slot Summary

Reveal matching gems, then let random multipliers decide how much value the result carries. Jewels and Gems uses that scratch-card promise instead of a conventional reel cycle, presenting 9 covered positions on a 3x3 board. Greentube pairs the compact format with high volatility, a 94.98% RTP, and an x1000.00 maximum win, making each reveal sequence brief but mathematically sharp.

How It Plays

Each purchase produces a 3x3 card containing 9 concealed positions. The player reveals them individually and checks the completed card for matching symbols.

A prize forms when at least 3 identical symbols appear. More than one matching group can occur on a card, and multiplier symbols can increase qualifying wins.

Features & Win Potential

The Lottery format replaces spinning reels with a fixed card and staged reveals. Once all positions are visible, the matching combinations determine the result.

Random multiplier symbols can appear among the revealed positions. When a Multiplier applies to a winning group, it raises that combination rather than creating a separate prize.

High volatility Multiplier 3 Reels Random multiplier Lottery

Spec sheet

Jewels and Gems at a glance.

Identity

Slot nameJewels and Gems

StudioGreentube

Released12/20/2023

Math

SlotRanker Score49

RTP94.98%

VolatilityHigh volatility

Max win1,000×

Bet range$0.20 – $8.00

Player rating4.5 / 5 · 10 votes

Format

Reels3

Paylines—

Layout3x3

Features

Themes

Expected average based on this slot's 94.98% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$4.02

Cost per session$4.02

Estimate only, for entertainment purposes — treat gambling as entertainment, not a way to make money, and set a budget you can afford to lose.

How long could a bankroll last on Jewels and Gems? We simulate thousands of sessions from this game's published RTP and volatility — the long-run math, not a prediction of your next spin.

Bankroll ($)Bet per spin ($)Speed

Volatility tier: High

Running simulation…

How this works

Each simulated spin either misses or returns a win drawn from a log-normal distribution, with the hit rate and spread set by the slot's volatility tier (High). The model is calibrated so the average return equals this slot's published RTP (94.98%), with wins capped at its top multiplier (1,000×).

This is a simplified, parametric model of the game's math — not its real paytable. It exists to make the house edge visible over many sessions, so the numbers above are averages across thousands of runs, never a forecast of one.

This is math, not a prediction. Real sessions vary wildly, and no strategy changes a game's built-in house edge. Play for fun, set limits, and never bet more than you can afford to lose.

Where to play Jewels and Gems

No matching casinos for your region yet

Casino availability depends on where you play from. We only show casinos that accept players from your country.

Compare Jewels and Gems with other games

	Jewels and Gems Score 49This game	Genie’s Link&Win 4Tune Score 87	Broadsiders Score 86	Crystal Quest Deep Jungle Score 83	Shadow Treasure Score 82
Identity
Studio	Greentube	All For One Studios	Massive Studios	Thunderkick	NowNow Gaming
Released	12/20/2023	4/25/2024	1/27/2025	10/2/2020	11/25/2024
Math
RTP	94.98%	96.24%	96.62%	96.14%	96.29%
Volatility	High volatility	High volatility	—	High volatility	Medium/High
Max win	1,000×	15,000×	30,000×	15,000×	12,000×
Format
Reels	3	5	7	6	5
Layout	3x3	5x3	7x7	6x4	5x5
Paylines	—	25	Cluster Pays	4096	14
Min bet	0.2	0.1	0.1	0.1	0.1
Max bet	8	20	100	100	100
Features
Progressive	—	—	—	—	—
Wild symbol	—	✓	✓	✓	✓
Free spins	—	✓	✓	✓	✓
Scatter symbol	—	✓	✓	✓	—
Multiplier	✓	—	✓	✓	✓
Bonus game	—	✓	—	—	—
Respins	—	✓	—	—	✓

Every number is shown as a delta against Jewels and Gems.

Comparing against

Jewels and Gems

Greentube

RTP

94.98%

Max win

1,000×

Score

Genie’s Link&Win 4Tune

+ Wild+ Free Spins+ Scatter+ Bonus Game+ Respins− Multiplier

+ Wild+ Free Spins+ Scatter

Crystal Quest Deep Jungle

+ Wild+ Free Spins+ Scatter

+ Wild+ Free Spins+ Respins

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