(red) (Heb. odem) the stone which occupied the first place in the first row of the high priest's breastplate. (Exodus 28:27) The sard, which is probably the stone denoted by odem , is a superior variety of agate, sometimes called camelian, and has long been a favorite stone for the engraver's art. Sardis differ in color: there is a bright-red variety, and perhaps the Hebrew odem from a root means "to be red," points to this kind.

The People of the New Earth
... of chalcedony and cornelian, a flesh colour): the sixth, a sardius (probably the ...
Blue (Chalcedony) Green (Emerald) Y { Red (Sardonyx) Red (Sardine) X { Yellow ...
/.../bullinger/commentary on revelation/the people of the new.htm

An Exposition on the First Ten Chapters of Genesis, and Part of ...
... was a very lively type, "Thou hast been in Eden, the garden of God; every
precious-stone, [that is, doctrine,] was thy covering; as the sardius, topaz, diamond ...
/.../bunyan/the works of john bunyan volumes 1-3/an exposition on the first.htm

Sardius

Sardius in the Breastplate

Sardius in the Garden of Eden

Sardius Sardine

Sardius: Figurative

Sardius: Seen in John's Apocalyptic Vision of the Foundation of the New Jerusalem