Revelation 4:3

4:3 And the one seated on it was like jasper ¹  and carnelian ²  in appearance, and a rainbow looking like it was made of emerald ³  encircled the throne.

Revelation 21:11

21:11 The city possesses ⁴  the glory of God; its brilliance is like a precious jewel, like a stone of crystal-clear jasper. ⁵ 

[4:3]  ¹ tn Grk “jasper stone.”

[4:3]  ² sn Carnelian was a semiprecious gemstone, usually red in color (L&N 2.36).

[4:3]  ³ tn Or “a rainbow emerald-like in appearance.”

[21:11]  ⁴ tn 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.

[21:11]  ⁵ tn On the term ἰάσπιδι (iaspidi) BDAG 465 s.v. 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; acc. to some, the diamond.”