Cornelian (usually spelled "carnelian") is a reddish-brown variety of the mineral chalcedony.

Cornelian may also refer to:

• Cornelian automobile, a 1914 racing vehicle
• Cornelian Bay (disambiguation), multiple places
• Cornelian dilemma, a dilemma named after dramatist Pierre Corneille
• Cornelia (gens), an important gens in ancient Rome
• Deudorix epijarbas , an Asian butterfly
• A variety of plants in the dogwood family including
  • Cornus florida
  • Cornelian cherry
  • Japanese cornelian cherry

See also

• Cornellian, a term used to describe people affiliated with Cornell University

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