ʾaḥlāmā אַחְלָ֑מָה ‘amethyst’ (Hebrew)

Etymology^?: perhaps from ḥālam חָלַם ‘be healthy / to dream’ (meaning dream-stone)
Roots: חלם

ʾaḥlāmā n, f
1) amethyst, a gem in the third row on the ephod, breastplate of judgment worn by the high priest. Transliteration of the Septuagint word. Identification is not certain but is a purple stone perhaps a corundum or red or brown jasper.