Iris Quartz
A variety of Quartz
What is Iris Quartz?
Also known as rainbow quartz, iris Quartz is a colorless quartz variety that contains thin, air-filled cracks that produce rainbow colors when hit by light. Iris Quartz is usually seen in crystal form since the material can't be cut into gems without losing its rainbow effect.
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 Iris Quartz 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 Iris Quartz
Iris Quartz 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
- Iridescent, White
- Streak
- White
Chemical Properties
- Chemical Formula
- SiO2
- Elements
- O, Si
Also Known As
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Iris Quartz FAQs
How do I identify Iris Quartz?
Iris Quartz can be identified by its Iridescent color. Look for these key characteristics when examining specimens.
What color is Iris Quartz?
Iris Quartz typically appears in Iridescent, White. Color can vary depending on impurities and formation conditions.
