26 Grk “from God, having the glory of God.” Here a new sentence was started in the translation by supplying the words “the city” to refer back to the previous clause and translating the participle (“having”) as a finite verb.
27 On the term ἰάσπιδι (iaspidi) ἴασπις states, “jasper, a precious stone found in various colors, mostly reddish, somet. green … brown, blue, yellow, and white. In antiquity the name was not limited to the variety of quartz now called jasper, but could designate any opaque precious stone. Rv 21:18f. W. λίθος 4:3 (TestSol C 11:8). λίθος ἴασπις κρυσταλλίζων a stone of crystal-clear jasper 21:11 (cp. Is 54:12); perh. the opal is meant here; to some, the diamond.”

In other versions

having the glory of God, its radiance like a most rare jewel, like a jasper, clear as crystal.

It shone with the glory of God, and its brilliance was like that of a very precious jewel, like a jasper, clear as crystal.

arrayed with God’s glory. Her radiance was like a precious jewel, like a jasper stone, clear as crystal.

It shone with the glory of God and sparkled like a precious stone—like jasper as clear as crystal.

that has the glory of God. Its radiance is like a precious stone, something like a jasper stone, shining like crystal.

Having the glory of God: and her light was like unto a stone most precious, even like a jasper stone, clear as crystal;

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