emerald: Nophech:, an emerald, the same with the ancient smaragdus:; one of the most beautiful of all the gems, and of a bright green colour, without any mixture. Exodus 39:11; Ezekiel 27:16
sapphire: Exodus 24:10; Job 28:6, Job 28:16; Song of Solomon 5:14; Ezekiel 1:26, Ezekiel 10:1; Revelation 4:3
diamond: Jeremiah 17:1; Ezekiel 28:13