חֹשֶׁן chôshen (H2833)

perhaps a pocket (as holding the Urim and Thummim), or rich (as containing gems), used only of the gorget of the highpriest

1) breastplate, breastpiece 1a) sacred pouch of the high priest designed to hold the Urim and Thummim

from an unused root probably meaning to contain or sparkle;