Garnet

Almandine-Spessartine

Refractive Index: 1.7736
Abbe Number: 56.3
Crystal System: Isotropic (cubic)
Formation: Natural
Dispersion Data: Measured (published fit)
Fits: 1

Refraction Fits

Fit #1

Shannon / Cauchy

$n$

n

= 1.7736

V_{D}

= 56.3

n^{2} = 1 + \frac{λ ^{2}}{0.4819 ( λ ^{2} - 0.011413 )}

Absorption Specimens

Almandine-Spessartine

Czech Republic, Bohemia

Almandine-Spessartine

India, Orissa State