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. Displays orange to red-brown coloration with a microcrystalline quartz 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 to 7 on the Mohs scale, translucent to opaque with a vitreous to waxy luster. Displays orange to red-brown coloration with a microcrystalline quartz structure.
Formation & geological history
Forms in hydrothermal veins and cavities within pre-existing rocks through the deposition of silica from groundwater, often associated with volcanic regions.
Uses & applications
Widely used for tumbled stones, beads, carved intaglios, and various ornamental jewelry pieces.
Geological facts
Carnelian has been prized since ancient times, frequently used by the ancient Egyptians as a protective amulet and for royal signet rings.
Field identification & locations
Identified by its distinctive warm orange or red color and waxy luster; 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