Gemstone encyclopedia
Carnelian — meaning, history and vintage jewelry
Carnelian is a warm orange to red chalcedony, a form of quartz with a microscopic crystal structure that makes it tough and easy to carve. It sits at 6.5 to 7 on the Mohs scale. Carnelian is the classic stone of antique intaglio seals and Victorian fob jewelry, and much of the material on the market has been heated, an ancient and accepted practice for this species.
What carnelian is
Because chalcedony has no cleavage and a very even structure, it takes fine engraving beautifully. That is why the Romans used it for signet intaglios and why nineteenth century revival jewelry returned to it again and again.
Carnelian is almost always cut as a cabochon, a flat plate or a carved intaglio rather than faceted. Color varies from a light apricot to an almost brick red, sometimes banded.
Color and hardness
- Species
- Chalcedony, a microcrystalline quartz
- Color
- Warm orange through to brownish red
- Mohs hardness
- 6.5 to 7
- What that means in wear
- Tough rather than hard. It resists breaking well but will scratch and dull with rough treatment.
How to care for carnelian
- Warm soapy water and a soft cloth. Dry thoroughly.
- Avoid ultrasonic and steam cleaning, particularly on carved or glued plaques.
- Keep away from harsh household chemicals, which can dull the polish.
Our full house rules, including what the one year warranty does and does not cover, are in the care & warranty guide.
History and symbolism
Used for seals and amulets in Egypt, Mesopotamia and Rome, then revived in Georgian and Victorian Europe for fob seals, signet rings and archaeological revival pieces in the 1860s and 1870s.
Historically associated with courage and vitality, and practically with identity, since a carnelian intaglio was for centuries how a person signed a letter.
Carnelian in vintage and antique jewelry
Georgian and Victorian fob seals, swivel rings and signet rings; Etruscan revival gold with carnelian scarabs; Art Deco desk and dress pieces using carnelian plaques against onyx and marcasite.
Shop this stone
Carnelian pieces in our collection
Every curated vintage, antique and estate piece is one of a kind and checked by our jewelry specialists in the Netherlands. If nothing is right today, we will look for it.
Frequently asked questions
- Is carnelian usually heated?
- Yes. Heating iron bearing chalcedony to deepen the orange has been done for thousands of years and is considered normal for the species.
- Why is carnelian used for intaglios?
- Its dense, even structure carves cleanly and holds fine detail, and wax does not stick to it, which is exactly what a seal needs.
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