Silicate

Silicates were a large class of minerals based on a tetrahedral silicon-oxygen unit (SiO4).

The spaceborne organism nicknamed "Junior", discovered by the USS Enterprise (NCC-1701-D) in 2367, had an outer shell made from silicates, actinides, and carbonaceous chondrite. 

The lifeforms on L-S VI are based on silicates rather than carbon. 

In 2374, the Silver Blood USS Voyager collected silicates from a comet in the Podaris sector. 

Types

 * Olivine