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Carnelian is a deep reddish brown semi-precious stone. It is a variety of chalcedony (which is itself an intermixture of the silicaceous minerals quartz and morganite—with a dash of iron compounds for color). Carnelian has been popular since the dawn of civilization for jewelry and for manufacturing objects such as beads, seals and signet rings. Here is a headdress from the tomb of the three queens–a grave which held three foreign born Semitic princesses simultaneously married to Pharaoh Thutmose III (c.1475-1425BC). The red slivers on the rosettes are made of carnelian (as were many beads and inlays from ancient Egypt).

Diadem with two gazelle heads and carnelian, turquoise, and glass (from the tomb of three queens ca. c.1475-1425 BC)
Carnelian is widely available and popular in all sorts of ornamental objects up to the present day. Carnelian is also the name of a deep brownish red color. Today the color carnelian is also known as Cornell red, since it is the official color of Cornell University.