'Substance' in the Bible

When the layer of dew evaporated, on the surface of the desert a fine flaky substance, as fine as frost, appeared on the ground.

The house of Israel named the substance manna. It resembled coriander seed, was white, and tasted like wafers made with honey.

and they see the God of Israel, and under His feet is as the white work of the sapphire, and as the substance of the heavens for purity;