Strong’s Greek
G2929 — krustallizo
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
κρυσταλλίζω
krustallizo — pronounced kroos-tal-lid'-zo
from 2930; to make (i.e. intransitively, resemble) ice ("crystallize"):--be clear as crystal. see GREEK for 2930
1 occurrence in the KJV.
Revelation 21:11
Having the glory of God: and her light was like unto a stone most precious, even like a jasper stone, clear as crystal;