A form of life found on Homeworld. An example of larger structures they can form are Lithos, similar to how most other species are formed by cells and bacteria.
Silicone based life. These were among the first complex lifeforms to evolve on Homeworld. They did so deep under the soil and bedrock. Shortly after silicone based cell colonies emerged, symbiotic groups of colonies did as well. One colony of cells would break down mineral nutrients and the byproducts would be taken up and further broken down by another type of colony. As some point a small collection of colonies became sufficiently large enough and interdependent to be considered a small complex lifeform.
This lifeform took on a shape and makeup visually akin to a geode. Very early on, their exterior wasn't very rigid and their interior had little to no space between walls (they were like collapsed balloons). Soon the interior started to hold acidic gel secreted by some of the outer wall cells. At this point harder compounds were needed to hold the acid environment in place. A rigid exterior shell formed. Molecularly it was very high density tubing for cell colonies to use as pathways in and out of the colony.
The rigid shell maintained contact with new mineral nutrients by dissolving what's around it and extruding waste nutrients. Their overall shape constantly changed to fit the surroundings and locate more mineral nutrients. Some of them maintained very complex shaping systems. Some grew large enough to envelope smaller silicone lifeforms. For the most part these were digested internally but on rare occasions they'd form a continued symbiotic relationship.
In a process similar to how prokaryote and eukaryote cells came to be, so did forms of complex silicone life. An early silicone macro-cell engulfed another with the intent to eat it. Instead the engulfed macro-cell didn't break down but consumed some of the fluid and particles within the acid gel. Its waste was in turn either used by the larger macro-cell or was excreted as waste. This symbiotic relationship took time and random chance before such a symbiont consistently reproduced in unison. It took even longer for several of these smaller macro-cells to work with and reproduce with the larger macro-cell as a single lifeform.
With that, the first silicone based macro-cellular life was formed. The rigid outermost shell continued to have a complex information network to transport cells and nutrients. This system also took the responsibility of releasing hormones within the acid gel to regulate internal organs. Within this outer shell is where intelligence began to form to varying degrees. Only a handful of the lifeforms started to emerge on the surface. The ones that did had to develop more complex shell shaping to keep up with the speed of surface life. This move from blobular to specific shapes helped more complex intelligence emerge as well. One group eventually evolved into Lithos.
The Galactic Magic Nullification caused most of this type of life to die off, including Lithos. Some of the more simple varieties remained though (see Past Extinction of a Forcibly Tidal-Locked Planet).