Banded Agate
What is Banded Agate?
Banded Agate is a variety of chalcedony, a cryptocrystalline form of silica. It is characterized by its distinct bands of varying colors and translucency, formed by the deposition of silica in concentric layers within cavities in volcanic rocks. The banding patterns are unique to each stone, creating intricate and visually appealing designs. Banded Agate is prized for its beauty and is often used in jewelry and ornamental objects.
Optical Properties
- Refractive Index
- 1.544 - 1.553
- Birefringence
- 0.004
- Pleochroism
- None
- Optical Character
- Isotropic to weakly anisotropic
- Dispersion
- 0.013
Banded Agate Market Value Calculator
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Banded Agate Localities Map
See where Banded Agate is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
Quick Facts
Physical Properties
- Color
- Wide range of colors including white, gray, brown, red, orange, yellow, green, and blue, often in banded patterns
- Hardness (Mohs)
- 6.5 - 7
- Density
- 2.58 - 2.64 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- SiO2
- Elements
- Silicon, oxygen, and trace elements
Also Known As
Banded AgateAgate
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