Hyacinth

Hyacinth is a historical gemological term referring to orange-red to reddish-brown transparent zircon, sometimes also applied to red-orange grossular garnet or orange hessonite. The name has classical origins, used since antiquity by Greek and Roman writers, and appears in medieval lapidaries as one of the twelve gemstones in the biblical breastplate of Aaron. In modern gemology, the term is largely superseded by specific variety names, though it remains in use as a color descriptor for warm-toned orange-red zircon.