carnelian
Sign in to saveCarnelian (also spelled cornelian) is a brownish-red mineral commonly used as a semiprecious stone. Similar to carnelian is sard, which is generally harder and darker; the difference is not rigidly defined, and the two names are often used interchangeably. Both carnelian and sard are varieties of the silica mineral chalcedony colored by impurities of iron oxide. The color can vary greatly, ranging from pale orange to an intense almost-black coloration. Significant localities include Yanacodo, Peru and Ratnapura, Sri Lanka. It has been found in Indonesia, Brazil, India, Iran, Russia (Siberia),
AI overview
Carnelian is a brownish-red semiprecious stone made from chalcedony, a mineral colored by iron oxide impurities, that has been valued and used for jewelry and decoration throughout history. It is found in various locations worldwide including Peru, Sri Lanka, and Indonesia, and ranges in color from pale orange to nearly black depending on the concentration of iron impurities.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Mineral.name
- Carnelian
- Mineral.category
- Tectosilicate minerals
- Mineral.group
- Quartz group
- Mineral.IMAstatus
- Variety of quartz (chalcedony)
- Mineral.boxtextcolor
- FFFFFF
- Mineral.boxbgcolor
- B31B1B
- Mineral.image
- Carnelian sard (mineral specimen).jpg
- Mineral.imagesize
- 250
- Mineral.formula
- SiO2 (silicon dioxide)
- Mineral.molweight
- 60 g/mol
- Mineral.color
- Reddish, orange, brownish
- Mineral.system
- Trigonal (quartz), monoclinic (moganite)
Article
7 sectionsContents
- History
- Etymology
- Distinction between carnelian and sard
- See also
- References
- Further reading
- External links
Carnelian (also spelled cornelian) is a brownish-red mineral commonly used as a semiprecious stone. Similar to carnelian is sard, which is generally harder and darker; the difference is not rigidly defined, and the two names are often used interchangeably. Both carnelian and sard are varieties of the silica mineral chalcedony colored by impurities of iron oxide. The color can vary greatly, ranging from pale orange to an intense almost-black coloration. Significant localities include Yanacodo, Peru and Ratnapura, Sri Lanka. It has been found in Indonesia, Brazil, India, Iran, Russia (Siberia), and Germany.
==History== thumb|upright=1.1|Polish signet ring in light-orange carnelian intaglio showing [[Korwin coat of arms]]