'Appearance' in the Bible

On the day that the tabernacle was raised up, the cloud covered the tabernacle, even the Tent of the Testimony: and at evening it was over the tabernacle as it were the appearance of fire, until morning.

So it was continually. The cloud covered it, and the appearance of fire by night.

The manna was like coriander seed, and its appearance like the appearance of bdellium.