A birthstone is a gemstone that represents a person's period of birth, which is usually the month or zodiac sign. Birthstones are often worn as jewelry or as a pendant necklace.

The priestly breastplate or breastpiece of judgment was a sacred breastplate worn by the High Priest of the Israelites, according to the Book of Exodus. In the biblical account, the breastplate is termed the breastplate of judgment, because the Urim and Thummim were placed upon it. These elements of the breastplate are said in the Exodus verse to carry the judgement of God concerning the Israelites at all times.