(Heb. shebo), a precious stone in the breast-plate of the high priest ( Exodus 28:19 ; 39:12 ), the second in the third row. This may be the agate properly so called, a semi-transparent crystallized quartz, probably brought from Sheba, whence its name. In Isaiah 54:12 and Ezekiel 27:16 , this word is the rendering of the Hebrew cadcod, which means "ruddy," and denotes a variety of minutely crystalline silica more or less in bands of different tints.
This word is from the Greek name of a stone found in the river Achates in Sicily.