Smaragdinos describes the rainbow around the throne as having an emerald-like appearance.

The attested use describes the rainbow around the throne by an emerald-like appearance in Revelation 4:3.

1. Emerald-like appearance · dominant

   In Revelation 4:3, the dative singular masculine form occurs in the comparison describing the rainbow around the throne; the APB renders the clause as a rainbow that “was like an emerald in appearance.”

   Revelation 4:3

In the Anselm Project Bible: In Revelation 4:3, the APB presents the comparison with “like an emerald in appearance.” This identifies the verse-level presentation rather than a precise word-for-word rendering.