mineral
Banded Agate (specifically Carnelian Agate)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
AI-generated identification · may be incorrectHardness: 6.5-7 (Mohs scale), Color: Reddish-orange with creamy white/brown bands, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (trigonal), Cleavage: None (conchoidal fracture), SG: 2.58-2.64
- Hardness
- 6
Identified More mineral →
Explore Banded Agate (specifically Carnelian Agate) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Reddish-orange with creamy white/brown bands, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (trigonal), Cleavage: None (conchoidal fracture), SG: 2.58-2.64
Formation & geological history
Formed by the deposition of silica from groundwater in cavities of igneous rocks or sedimentary formations over millions of years. The bands are created by periodic changes in the silica concentration and mineral impurities.
Uses & applications
Widely used for jewelry (beads, cabochons), ornamental objects, carvings, and as a popular specimen for crystal collecting and healing practices.
Geological facts
Agate has been used since the Babylonian times for ornaments and tools. The name 'Carnelian' specifically refers to the brownish-red variety of chalcedony colored by iron oxide.
Field identification & locations
Identify in the field by its waxy luster, hardness (will scratch glass), and distinctive concentric or parallel banding when broken or tumbled. Commonly found in Brazil, India, and the Lake Superior region.
