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
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Banded Amethyst before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Where to Find Banded Amethyst
Banded Amethyst is a variety of Quartz. RockHoundR, the free-to-download rockhounding map from the Ruby Glint team, shows where collectors find quartz in the US, with land-access notes for BLM land and national forests. Collecting is banned in national parks.
See where to find quartzAlways check the local rules and get the landowner's permission before you collect.
Quick Facts
Physical Properties
- Color
- Lavender (light purple), Purple, White
- Streak
- White
Chemical Properties
- Chemical Formula
- SiO2
- Elements
- Si, O
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Banded Amethyst FAQs
How do I identify Banded Amethyst?
Banded Amethyst can be identified by its Lavender (light purple) color. Look for these key characteristics when examining specimens.
What color is Banded Amethyst?
Banded Amethyst typically appears in Lavender (light purple), Purple, White. Color can vary depending on impurities and formation conditions.
