Easton’s Bible Dictionary
Ligure: (Heb. leshem) occurs only in Exodus 28:19 and 39:12, as the name of a stone in the third row on the high priest's breastplate. Some have supposed that this stone was the same as the jacinth (which see), others that it was the opal. There is now no mineral bearing this name. The "ligurite" is so named from Liguria in Italy, where it was found.