From Starbounder - Starbound Wiki
It's a common emblem for the Hylotl. Three crystals representing their three eyes...
Hylotl Emblem is a hylotl themed decorative object found in Hylotl Underwater Cities, Hylotl Surface Cities and Hylotl houses on Ocean islands.
|Apex :||The symbol of the Hylotl people.|
|Avian :||Avians prefer wing symbolism over eye symbolism.|
|Floran :||Three Hylotl eyes sssstaring at Floran... Floran doesn't like!|
|Glitch :||Critical. This Hylotl symbol is unsettling due to them having too many eyes.|
|Human :||The Hylotl symbol for their people.|
|Hylotl :||A symbol of my people.|
|Novakid :||An emblem. The three gems represent Hylotl eyes, I guess.|
- Spirited Giraffe: Added