Where to Find Rubies and Gel Sacks in Subnautica 2

Rubies and Gel Sacks: Key Mid-Game Resources

Rubies and Gel Sacks are two mid-game resources that gate several important blueprints in Subnautica 2. Rubies are needed for aerogel and advanced vehicle components, while Gel Sacks are used for aerogel and lubricant alternatives. Both spawn in overlapping biomes, so you can farm them together. This guide shows you exactly where to look.

Where to Find Rubies

Rubies are small, bright red crystalline formations found on cave walls and the seabed. The best biomes for Rubies are:

1. Deep Grand Reef

The grand reef at 200-500 m has Ruby nodes scattered on the ground and walls. The bioluminescent environment makes the red Rubies easy to spot.

2. Lost River

The lost river contains Rubies alongside Lithium and Nickel. The ghostly corridors are a one-stop shop for mid-game resources.

3. Sea Treader's Path Caves

Caves along the Sea Treader path have Rubies at moderate depth. This is a safer option than the deep grand reef.

Where to Find Gel Sacks

Gel Sacks are purple, pulsating organic pods found on the seabed and cave walls. They are easy to miss because they blend into dark backgrounds. The best locations are:

1. Deep Grand Reef

The same biome that has Rubies also has Gel Sacks scattered on the floor. Farm both resources in one trip.

2. Sparse Reef

The sparse reef has Gel Sacks at 150-300 m on the open seabed. It is one of the safest Gel Sack farms.

3. Lost River

Gel Sacks appear on the walls of the lost river corridors alongside other resources.

Location and Collection Summary

Farming Tips

• Gel Sacks can be grown: Place a Gel Sack in an exterior growbed or alien containment to farm them infinitely. Harvest once and replant for a permanent supply.
• Rubies cannot be grown: They must be mined from the wild. The Sea Treader's Path and grand reef are the most renewable natural sources.
• Farm both together: The deep grand reef has both Rubies and Gel Sacks, making it the most efficient single-trip resource run.
• Use a Seamoth: Most Ruby and Gel Sack locations are within the 900 m Seamoth range, so you do not need the Prawn Suit.

What to Craft with Rubies and Gel Sacks

Both resources are key ingredients for aerogel, which is used in the Prawn Suit, the Cyclops, and several advanced modules. Rubies are also used for the compass and certain vehicle mods. Gel Sacks are used for aerogel and as an alternative lubricant source. Always keep a stockpile of both because aerogel is consumed in bulk by late-game recipes.