'Appearance' in the Bible

Now on the day that the tabernacle was erected, the cloud [of God’s presence] covered the tabernacle, that is, the tent of the Testimony; and in the evening it was over the tabernacle, appearing like [a pillar of] fire until the morning.

So it was continuously; the cloud covered it by day, and the appearance of fire by night.

The manna was like coriander seed, and it looked like bdellium.