Ruby Gemstone Fish It Guide (June 2026) Location & Tips

Written By: Yash Thakur
Updated On: January 6th, 2026

The Ruby Mutated Gemstone has become one of the most sought-after items in Fish It Roblox since the January 2026 update, serving as a crucial requirement for the prestigious Diamond Rod quest. Many players struggle to obtain this rare item because they don’t understand the mutation mechanics or optimal fishing locations. This comprehensive guide will show you exactly where to find Ruby Gemstones, how to increase your mutation chances, and the fastest path to completing the Diamond Rod quest.

Quick Reference: Ruby Gemstone Essentials

Information	Details
Rarity	Legendary (1 in 15,000 chance)
Best Locations	Ocean, Tropical Grove, Lost Isle
Mutation Chance	0.5% base rate
Required For	Diamond Rod quest
Best Method	Mutation Potion + High Luck Rod
NPC	Diamond Researcher (Larry)

What is Ruby Mutated Gemstone?

Ruby Mutated Gemstone is a special version of the regular Ruby Gemstone that has gained the “Mutated” status, making it essential for progression in Fish It. While normal Ruby Gemstones are valuable, only the mutated variant will be accepted by Diamond Researcher Larry for the Diamond Rod quest. The mutated version appears identical to the regular Ruby but displays “Mutated” in its item description, which is crucial for quest completion.

Contents

The Diamond Rod stands as the most powerful fishing rod in Fish It 2026, boasting incredible stats: Luck 1300, Reel Speed 150%, and Weight capacity of 800,000 kg. This makes it capable of reeling in the game’s rarest creatures, including the Lochness Monster and various secret fish. However, obtaining this rod requires completing one of the most challenging questlines in the game, with the Ruby Mutated Gemstone being a key bottleneck for many players.

Where to Find Ruby Gemstone: Best Locations

Ruby Gemstones can only be obtained through fishing, and location selection significantly impacts your success rate. Based on extensive research and community data, here are the three primary locations where Ruby spawns:

Ocean Areas (Primary Location)

The Ocean remains the most reliable location for Ruby Gemstone hunting. As a Legendary-tier item with a 1 in 15,000 catch chance, the Ocean offers consistent spawn rates and is easily accessible from Fisherman Island. Many experienced players recommend fishing near popular Ocean spots, as these areas tend to have higher fish density and better luck multipliers.

Pro Tip: Use your fishing radar to identify areas with boosted catch rates in the Ocean. These hotspots can significantly increase your chances of finding rare items like Ruby Gemstones.

Tropical Grove (Alternative Location)

Tropical Grove offers another viable location for Ruby hunting, with the same 1 in 15,000 spawn rate. This location is particularly advantageous because it’s also the best spot for farming Enchant Stones (1 in 1,000 chance), which you’ll need for rod enchantments. The dual-purpose nature of Tropical Grove makes it an efficient choice for players looking to progress multiple objectives simultaneously.

Lost Isle – Treasure Room & Sisyphys Statue

For players with access to Lost Isle, both the Treasure Room and Sisyphys Statue areas offer Ruby Gemstone spawns. These locations typically have higher fish density but may require additional progression to access. The Treasure Room, in particular, is known for spawning multiple Legendary-tier items, making it a high-risk, high-reward location.

Understanding Mutation Mechanics

The mutation system in Fish It adds an extra layer of complexity to obtaining the Ruby Mutated Gemstone. According to the official Fish It Wiki, the Gemstone mutation has a base 0.5% chance, making it one of the rarer mutations in the game.

How Mutations Work?

When you catch a Ruby Gemstone, there’s a small chance it will have a mutation. The mutation system is separate from the base catch chance, meaning you first need to catch a Ruby (1 in 15,000), then have it roll for mutation (0.5%). This explains why many players struggle to obtain the mutated version despite catching multiple regular Rubies.

Available Mutations and Their Rates

From the Fish It Wiki, here are the common mutation rates:

STONE – 1.4%
GOLD – 1.2%
GHOST – 1.0%
RADIOACTIVE – 0.9%
LIGHTNING – 0.8%
MIDNIGHT – 0.7%
FAIRY DUST – 0.6%
GEMSTONE – 0.5%

How to Get Ruby Mutated Gemstone Faster?

1. Use Mutation Potion (Most Effective Method)

Mutation Potion is the most reliable way to increase your chances of getting mutated catches. This special potion significantly boosts the mutation rate for all catches during its duration.

Best Practices for Mutation Potion:

Activate the potion before starting your fishing session
Do not change maps or servers while the potion is active
Fish continuously without interruption until the potion expires
Focus on high-density fishing spots to maximize catch volume

Mutation Potions can be obtained through various means:

Completing the Variety Diet Quest (rewards Mutation I Potion)
Purchasing from other players
Finding in special events or giveaways

2. Optimize Your Luck Stats

While mutation doesn’t fully depend on luck, higher Luck stats increase your overall catch rate, which indirectly improves your chances of finding Ruby Gemstones that can potentially mutate.

Recommended Setup for Maximum Luck:

Use a rod with high base Luck stats
Apply Leprechaun II enchantment (+50% Luck)
Activate Luck events when available
Fish during server peak times for potential luck bonuses
Consider using Luck potions from previous quests

3. Use Mutation Hunter Enchantments

For serious Ruby Mutated Gemstone hunters, the Mutation Hunter enchantments are essential:

Mutation Hunter I: 10% more chance for mutation
Mutation Hunter II: 30% more chance for mutation (S-tier enchantment)

These enchantments stack with Mutation Potion effects, creating the highest possible mutation rates in the game.

4. Choose the Right Rod and Enchantments

Your rod choice and enchantments significantly impact your success rate. Here’s the optimal setup:

Best Rods for Ruby Hunting:

Element Rod (required for Diamond Rod quest anyway)
Any rod with high Luck stats
Rods with Mutation Hunter enchantments

Essential Enchantments:

Mutation Hunter II (30% more mutation chance)
Leprechaun II (+50% Luck)
Perfection (for other Diamond Rod quest requirements)

Complete Diamond Rod Quest Walkthrough

The Ruby Mutated Gemstone is just one part of the larger Diamond Rod quest. Here’s the complete quest breakdown:

Quest Prerequisites

Level Requirement: Must be Level 5 or higher
Location: Mutation Cellar on Fisherman Island
NPC: Diamond Researcher (Larry)

All Six Quest Requirements

Own an Element Rod – Must be purchased/completed first
Catch a Secret Fish at Coral Reefs – Eerie Shark (1 in 250,000)
Catch a Secret Fish at Tropical Grove – Great Whale (1 in 950,000)
Bring a Mutated Gemstone Ruby – Our main focus
Bring a Lochness Monster – From Kohana area (1 in 3,000,000)
Catch 1,000 Fish with Perfect Throws – Use Perfection enchant

Step-by-Step Quest Completion

Step 1: Access the Mutation Cellar

Spawn on Fisherman Island and locate the Mutation Cellar entrance. It’s opposite the limited-time crates display. Press “Teleport” to enter (requires Level 5+).

Step 2: Meet Diamond Researcher Larry

Inside the Mutation Cellar, find Larry the Scientist and select “Diamond Researcher Quest” to begin the questline.

Step 3: Complete All Requirements

Work through each requirement systematically. Many players recommend starting with the Ruby Mutated Gemstone since it’s less RNG-dependent than the secret fish.

Step 4: Claim Your Diamond Rod

Once all requirements are complete, return to Larry and select the exchange option. The Diamond Rod will be added to your inventory immediately.

Advanced Strategies for Ruby Mutated Gemstone Hunting

Server Hopping Technique

Some experienced players recommend server hopping when fishing for rare items. The theory is that fresh servers might have better spawn rates for legendary items. However, this is unconfirmed and may disrupt your Mutation Potion timer.

Time-Based Fishing

While Fish It doesn’t have confirmed time-based mechanics, many players report better results during:

Server peak hours (when more players are active)
During special events or updates
After server restarts/maintenance

Group Fishing Strategies

Coordinate with other players to cover multiple fishing spots simultaneously. Share information about Ruby spawns and mutation successes to optimize group efficiency.

Common Mistakes to Avoid

1. Not Checking Mutation Status

Many players waste time catching regular Rubies without checking for the “Mutated” status. Always verify your catches before heading to Larry.

2. Changing Maps During Mutation Potion

The Mutation Potion timer resets if you change maps or servers, wasting the precious buff time.

3. Ignoring Luck Stats

Some players focus only on mutation while neglecting their Luck stats, reducing their overall Ruby catch rate.

4. Not Using the Right Enchantments

Fishing without Mutation Hunter or Leprechaun enchantments significantly reduces your efficiency.

Rod Enchantment Guide for Ruby Hunting

Understanding the enchantment system is crucial for maximizing your Ruby Mutated Gemstone hunting efficiency.

How to Enchant Your Rod

Obtain Enchant Stones: Caught randomly (1 in 1,000 chance) or purchased for 29 Robux
Visit Esoteric Depths: Pay 400 coins to access the enchantment altar
Place Enchant Stone: Hold the stone and press E at the altar
Receive Random Enchantment: The stone is consumed and you receive a random enchant

Best Enchantments for Ruby Hunting

Based on the Beebom enchantment tier list:

S-Tier (Must Have):

Leprechaun II: +50% Luck (highest luck boost)
Mutation Hunter II: 30% more mutation chance

A-Tier (Highly Recommended):

Prismatic I: Rainbow boost activates with 10 less throws
Empowered I: +20% Luck, +10% faster reel
Cursed I: -75% Luck, +75% mutation chance (high risk, high reward)

Enchantment Pull Rates

Using normal enchant stones (29 Robux):

Mutation Hunter I: 10% chance
Leprechaun I: 10% chance
Mutation Hunter II: 5% chance
Leprechaun II: 5% chance

Using super enchant stones (49 Robux):

Only 5 possible enchantments, each with 20% chance
Includes Mutation Hunter II and Leprechaun II

Perfect Throw Strategy for Quest Completion

While working on the Ruby Mutated Gemstone, you’ll also need to complete 1,000 perfect throws for the Diamond Rod quest. Here’s how to optimize this:

Use the Perfection Enchantment

The Perfection enchantment automatically counts every throw as perfect, making this requirement much easier to complete. This enchantment can be obtained through regular enchant stones.

Combine with Other Activities

Work on perfect throws while hunting for Ruby Mutated Gemstone to maximize efficiency. Each cast counts toward both objectives.

Track Your Progress

The game tracks your perfect throw count in the quest menu. Monitor your progress to ensure you’re on track for completion.

Community Resources and Official Channels

Stay connected with the Fish It community for the latest updates, tips, and strategies:

Official Discord Server

Join the official Fish It Discord for:

Real-time discussions with 35,000+ players
Admin event notifications
Trading opportunities
Exclusive giveaways and codes

Developer Social Media

Follow the game developer for official updates:

Twitter: @TalonMidnight – Co-owner of Fish It
Roblox Group: Fish Atelier

Community Wikis and Resources

Official Wiki: Fish It! Wiki
Alternative Wiki: Fish It Wiki with codes and guides
Game Page: Fish It on Roblox

Reddit Communities

While there isn’t an official Fish It subreddit, you can find discussions in general Roblox communities and fishing game subreddits.

Frequently Asked Questions

How long does it take to get Ruby Mutated Gemstone?

The time varies greatly depending on your luck, setup, and fishing efficiency. With optimal setup (Mutation Potion + Mutation Hunter II + high Luck), it might take 2-4 hours of dedicated fishing. Without optimal setup, it could take 10+ hours.

Can I buy Ruby Mutated Gemstone from other players?

Yes, Ruby Mutated Gemstones can be traded with other players. However, prices vary significantly based on demand and availability.

Does the time of day affect Ruby spawn rates?

There’s no confirmed evidence that time affects spawn rates in Fish It. However, some players report better results during peak server hours.

What’s the difference between Ruby and Ruby Mutated Gemstone?

Regular Ruby is a Legendary fish worth coins, while Ruby Mutated Gemstone has the “Mutated” status and is required for the Diamond Rod quest. They look identical but have different functions.

Can I complete the Diamond Rod quest without Ruby Mutated Gemstone?

No, the Ruby Mutated Gemstone is a mandatory requirement for the Diamond Rod quest. Larry will not accept a regular Ruby.

What happens if I lose my Ruby Mutated Gemstone?

If you lose or accidentally sell your Ruby Mutated Gemstone, you’ll need to obtain another one to complete the quest. Store it safely in your inventory until you can turn it in.

Are there any codes or free items to help with Ruby hunting?

Check the official Discord and community resources for active codes. Some codes might provide Luck potions or other helpful items for your Ruby hunting journey.

Conclusion

Obtaining the Ruby Mutated Gemstone is a challenging but rewarding journey in Fish It 2026. By following the strategies outlined in this guide—using Mutation Potions, optimizing your Luck stats, choosing the right locations, and using proper enchantments—you can significantly increase your chances of success.

Remember that patience is key when hunting for such rare items. The Diamond Rod reward is well worth the effort, providing the best stats in the game for catching the rarest fish. Stay connected with the community through the official Discord and social media channels for the latest updates and strategies.

Good luck with your Ruby Mutated Gemstone hunting, and may your catches be ever in your favor! Don’t forget to bookmark this guide for future reference, as we’ll update it with new strategies and information as the game evolves.