The Hebrew word in Exodus 28:18; Exodus 39:11; Ezekiel 28:13 , is yahalom . It occurs only in these places, and cannot be identified; it is generally held not to be what is now known as the diamond. In Jeremiah 17:1 the word is shamir . This is translated 'adament' in Ezekiel 3:9 . It is thought to be the corundum, a very hard stone, but being of different hues it has now various names.