Gel Sack
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Databank entry
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