coral

Concise Bible Dictionary:

Red Coral
The Hebrew word is rarnoth, and occurs only in Job 28:1818No mention shall be made of coral, or of pearls: for the price of wisdom is above rubies. (Job 28:18) and Ezekiel 27:16: it signifies high priced or costly things. The Rabbis think it refers to red coral.

Strong’s Dictionary of Hebrew Words:

Transliteration:
ra’mah
Phonic:
raw-maw’
Meaning:
from 7213; something high in value, i.e. perhaps coral
KJV Usage:
coral

Jackson’s Dictionary of Scripture Proper Names:

heights