Strong’s Hebrew
H2137 — zkuwkiyth
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
זְכוּכִית
zkuwkiyth — pronounced zek-oo-keeth
from 2135; properly, transparency, i.e. glass:--crystal. see H02135
1 occurrence in the KJV.
Job 28:17
The gold and the crystal cannot equal it: and the exchange of it shall not be for jewels of fine gold.