Albert Barnes Commentary Ezekiel 10:1

"Then I looked, and behold, in the firmament that was over the head of the cherubim there appeared above them as it were a sapphire stone, as the appearance of the likeness of a throne." — Ezekiel 10:1 (ASV)

As in (Ezekiel 1:0), the vision of the glory of the Lord, the particulars given identifying the two visions.