Strong's Definition
apparently from the same as 1865; properly, a pearl (from its sheen as rapidly turned); by analogy, pearl-stone, i.e. mother-of-pearl or alabaster
KJV Usage: X white
STEPBible — Tyndale Abridged Hebrew Lexicon
דַּר (dar) — mother-of-pearl. pearl, mother of pearl
UBS Dictionary of Biblical Hebrew
noun m
Stone
mother-of-pearl = hard, smooth, pearly layer ◄ from the inside of certain seashells; ► used for varied purposes; ≈ cherished as precious and as sign of status
UBS Dictionary of Biblical Hebrew © United Bible Societies, licensed CC BY-SA 4.0.
Brown-Driver-Briggs Hebrew Lexicon
דַּר n.[m.] pearl? mother of pearl? (Ar. Arabic pearls, Arabic a pearl) Est 1:6. ref