Lexical Definition

‎לֶשֶׁם‎ leshem (leh'-shem) jacinth ^H:N-M
from an unused root of uncertain meaning

ligure.

• a gem, perhaps the jacinth

1) a precious stone
1a) a precious stone in the high priest's breast-plate
1a1) probably jacinth or ligure

Brown-Driver-Briggs

I. ‎לֶ֫שֶׁם‎ noun [masculine] a precious stone in high priest's breast-plate Exod 28:19; Exod 39:12 (√ and meaning dubious; ᵐ5 λιγύριον, Joseph^{Ant. «JOSEPHUS:Antiquities 3:7»iii. 7}, 5 λίγυρος, ᵑ9 ligurius, and this (= λυγκούριον, lyncurion ?) compared with carbuncle Plin^{NH viii. 57 (38)}; identification with amber Demostratus in Plin^{NH xxxvii 11(2)}, or with jacinth (Rev 21:20) Braun^{De Vest. Sacerd. ii. 14} Winer^{RWBi. 332}; compare further, Di^{Exod 28:19}).

Brown-Driver-Briggs References