The Pulpit Commentary - Revelation 21:20
The fifth, sardonyx . A variety of agate—a kind of onyx, valued for its use in engraving into cameos. The name onyx appears to be owing to the resemblance in colour to the fingernails. The sixth, sardius. Probably the modern carnelian (see on Revelation 4:3 ). The seventh, chrysolyte. A variety of the gem of which that called topaz (the ninth stone) is another kind. This species contained a considerable amount of yellow colour, whence the name "golden stone." It has been... read more
The Pulpit Commentary - Revelation 21:19
And the foundations of the wall of the city were garnished with all manner of precious stones. Omit "and" (cf. Isaiah 54:12 , "All thy borders of pleasant stones"). Foundations (cf. Revelation 21:14 ). The first foundation was jasper. Probably the diamond (see on Revelation 4:3 ). The second, sapphire. Thought to be the modern lapis lazuli. It was of a clear blue colour ( Exodus 24:10 ), and very precious ( Job 28:16 ). The third, a chalcedony. Not the modern stone of that... read more