crystalline 

Definition:  (adjective) Transmitting light; able to be seen through with clarity.  
Synonyms:  limpid, lucid, pellucid, transparent  
Usage:  This water is of such crystalline purity that the body of the bather appears of an alabaster whiteness.  

Now I'm reviewing my Honkai Star Rail English Notes. In *The Preservation — Qlipoth*, the word "crystalline" appears.

The sentence containing this word is that:  The builder of the Celestial Comet Wall, the Subspace Crystalline Barrier, and the Great Attractor Base.