From Starbounder - Starbound Wiki
It's a common emblem for the Hylotl. Three crystals representing their three eyes...
|The symbol of the Hylotl people.
|Avians prefer wing symbolism over eye symbolism.
|Three Hylotl eyes sssstaring at Floran... Floran doesn't like!
|Critical. This Hylotl symbol is unsettling due to them having too many eyes.
|The Hylotl symbol for their people.
|A symbol of my people.
|An emblem. The three gems represent Hylotl eyes, I guess.