The breastplate/choshen of the High Priest was ordained to be securely attached to the ceremonial apron/ephod that covered the body of the High Priest.

Anyway, the breastplate’s obviously a lot of work, so what if I do it and the ephod, and you take the rest? —Okay, but remember, it’s supposed to be “a breastplate of judgment ...

The ephod was not the only item that required the skilled work of chashab. Other items in the Tabernacle, such as the curtains, veil, band, and breastplate of judgment, also needed this level of ...

True leadership must fulfill the criterion symbolized in the Priestly garments and later declared by Moshe himself.

And the Nesi’im (leaders of the tribes) brought lapis lazuli and other stones for setting, for the ephod and for the breastplate; and spices and oil for lighting, ...

And although there was detailed description of all the priestly garb, two specific items, the ephod and breastplate, were explained in much greater detail than the rest.

This brings to mind the famous Rashi (Shemos 28:4) that describes the form of the Ephod. The Ephod was one of the garments that the high priest wore, composed of cloth and had the breastplate ...

Of the 12 stones on the High Priest's ephod (breastplate), the stone for Nissan is known as “nophech” and is identified with a turquoise or blue emerald.