Banded Amethyst
Banded Amethyst tumbled
A variety of Quartz
What is Banded Amethyst?
Known as the birthstone of February, banded Amethyst is a polished, semi-precious stone that is prized for its alternating bands of purple and white. This gem is actually a combination of Amethyst and pure Quartz and it's also known as Chevron Amethyst. Some portions are translucent.
Optical Properties
- Refractive Index
- 1.544-1.553
- Birefringence
- 0.009
- Pleochroism
- Weakly dichroic
- Optical Character
- Biaxial positive
- Dispersion
- 0.013
Banded Amethyst Market Value Calculator
Estimate the market value of Banded Amethyst using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Banded Amethyst Localities Map
See where Banded Amethyst 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
- Lavender (light purple), Purple, White
- Streak
- White
Chemical Properties
- Chemical Formula
- SiO2
- Elements
- Si, O
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