ADAMANT is twice (Eze_3:9, Zec_7:12) used in AV [Note: Authorized Version.] and RV [Note: Revised Version.] as tr. [Note: translate or translation.] of shâmir, which is elsewhere rendered either ‘brier’ (Isa_5:6; Isa_7:23-25; Isa_9:18; Isa_10:17; Isa_27:4; Isa_32:13) or ‘diamond’ (Jer_17:1). ‘Diamond,’ which arose from ‘adamant’ by a variety of spelling (‘adamant,’ or ‘adimant,’ then ‘diamant’ or ‘diamond’), has displaced ‘adamant’ as the name of the precious stone, ‘adamant’ being now used rhetorically to express extreme hardness.