Labradorite

Refractive Index: 1.5664
Abbe Number: 58.2
Crystal System: Isotropic (cubic)
Formation: Natural
Dispersion Data: Measured (published fit)
Fits: 1

Refraction Fits

Fit #1

Shannon / Cauchy

$n$

n

= 1.5664

V_{D}

= 58.2

n^{2} = 1 + \frac{λ ^{2}}{0.7095 ( λ ^{2} - 0.010571 )}

Absorption Specimens

Finland, Southern Finland Region, Lappeenranta (Ylämaa Quarry)

United States, Oregon (Harney County), Burns (Ponderosa Mine)

United States, Oregon (Lake County), Plush

United States, Oregon (Lake County), Plush