gemstone
Carnelian
Silicon dioxide (Chalcedony variety, SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, red to orange-brown color, waxy to vitreous luster, and microcrystalline trigonal structure.
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 6.5-7 on the Mohs scale, red to orange-brown color, waxy to vitreous luster, and microcrystalline trigonal structure.
Formation & geological history
Formed through the deposition of silica-rich groundwater in cavities of volcanic or sedimentary rocks over millions of years.
Uses & applications
Widely used in jewelry, cabochons, beads, and carved intaglios due to its durability and rich color.
Geological facts
Carnelian has been prized since ancient times, frequently used in Roman signet rings and ancient Egyptian funerary amulets.
Field identification & locations
Identified by its distinctive translucent reddish-orange hue and conchoidal fracture; commonly sourced from India, Brazil, and Madagascar.
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