Rainbow Moonstone
A variety of Labradorite
Precious GemstoneUncommon
What is Rainbow Moonstone?
A variety of labradorite, rainbow Moonstone is generally a translucent stone that exhibits rainbow colors when seen in natural light. This stone has been used since ancient times — Romans and Greeks associated this stone with their lunar gods. Today, it's cut into beads and cabochons and used with jewelry.
Optical Properties
- Refractive Index
- 1.554-1.573
- Birefringence
- 0.007-0.011
- Pleochroism
- Red stones from the Congo - weak; Green stones - distinct: greenish yellow to bluish green
- Optical Character
- Biaxial positive
- Dispersion
- 0.012
Discover Values
Rarity
3.9out of 5.0
78%
Popularity
4.1out of 5.0
82%
Beauty
4.2out of 5.0
84%
Cultural Value
3.8out of 5.0
76%
Collection Value
4.2out of 5.0
84%
Rainbow Moonstone Market Value Calculator
Estimate the market value of Rainbow Moonstone using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Rainbow Moonstone Localities Map
See where Rainbow Moonstone is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
Key Characteristics
Composition of Rainbow Moonstone
[Na(90 70%)Ca(10 30%) Al, Si]AlSi2O8, Sodium Calcium Aluminum Silicate
Quick Facts
Physical Properties
- Color
- White, blue, iridescent
- Hardness (Mohs)
- 6 - 6.5
- Density
- 2.65 - 2.75 g/cm³
- Streak
- White
- Luster
- Pearly, Vitreous
- Crystal System
- Triclinic
Chemical Properties
- Chemical Formula
- (Na, Ca)Al1-2Si3-2O8
- Elements
- Na, Ca, Al, Si, O
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