yashepheh, ἴασπις. This is not considered to be the same as the modern jasper, which is an opaque variety of quartz of many different colours. To what gem scripture refers is not known: some suppose the diamond. In Revelation 21:11 it is described as 'clear as crystal.' It had a place in the high priest's breastplate, and was one of the stones in the covering of the symbolical king of Tyrus in Eden. Exodus 28:20; Exodus 39:13; Ezekiel 28:13 . He who sat on the throne in heaven, as seen by John, was 'to look upon like a jasper;' it is also used in the description of the heavenly Jerusalem. Revelation 4:3; Rev.21:11,18,19. The jasper is a symbol of the communicable glory of God. Compare John 17:22 .