The Gel Sack is an edible flora species that may also be used to craft Aerogel.

It is usually found attached to the walls of caves. It can be either picked up or harvested for Gel Sack Spores by using a Knife. Both items can then be planted in an Exterior Growbed.


The Gel Sack is hemispheric in shape and has a black surface covered with thick, twisted ridges. Randomly scattered across its surface are protruding, bioluminescent pink spots.

Uses in Crafting

Gel SackAluminum Oxide CrystalArrow-right (1)FabricatorArrow-right (1)Aerogel

Energy Value

Gel SackArrow-right (1)BioreactorArrow-right (1)Energy×125

Data Bank Entry

Gel Sack Data Bank Image

These organic structures grow on cave walls. The purple sacks which arise from the surface contain a low-density gel laced with spores. These burst from time to time, floating towards the surface and attaching onto the next rock face they encounter.

While the gel sack is edible, its low-density renders it an invaluable advanced construction material.

Assessment: Edible - Aerogel construction applications



  • The Gel Sack was originally called the Jelly Plant and the Spore Sack.
  • Gel Sacks are unique among edible flora in that they will not rot and can be stored indefinitely.
  • Gel Sacks are also one of the only edibles that will not trigger a 'blood loss detected' effect, no matter how many are eaten at one time.
  • When harvesting Gel Sack spores with a knife, Gel Sacks grown in an exterior growbed (note that when planting the spores, the Gel Sack will not be visible until very close) can be struck up to 3 times to generate 3 spores before being destroyed. It's worth noting that spores can be collected without actually destroying the Gel Sack by striking the Gel Sack only 1-2 times with a knife. This means that it is possible to generate spores while retaining the Gel Sack itself for other uses (i.e. food, energy, aerogel).