gemstone
Carnelian
Silicon dioxide (chalcedony variety SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, translucent to opaque, with a vitreous to waxy luster and reddish-orange color.
Identified More gemstone →
Explore Carnelian in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 6.5 to 7 on the Mohs scale, translucent to opaque, with a vitreous to waxy luster and reddish-orange color.
Formation & geological history
Formed through the deposition of silica from groundwater in cavities of rocks, commonly volcanic or sedimentary environments.
Uses & applications
Widely used in jewelry, signet rings, carvings, and ornamental lapidary work.
Geological facts
Carnelian has been prized since ancient times, frequently used in ancient Egyptian and Roman seals and amulets.
Field identification & locations
Identified by its waxy luster, conchoidal fracture, and warm orange-to-red hues; commonly found in gravel beds and desert regions.
More like this
Other gemstone specimens
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Gemstone Ring
N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ
gemstone
Amber
Succinite (Organic Gemstone)
mineral
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Pearl necklace
Pearl, primarily aragonite (CaCO₃) and conchiolin
gemstone