Garnet

Pyrope

Refractive Index: 1.7395–1.7680
Abbe Number: 58.9–61.5
Crystal System: Isotropic (cubic)
Formation: Natural
Dispersion Data: Measured (published fit)
Fits: 3

Refraction Fits

Fit #1

Shannon / Cauchy

$n$

n

= 1.7395

V_{D}

= 61.5

n^{2} = 1 + \frac{λ ^{2}}{0.5089 ( λ ^{2} - 0.010415 )}

Fit #2— Specimen fit

Shannon / Cauchy

$n$

n

= 1.7523

V_{D}

= 60.3

n^{2} = 1 + \frac{λ ^{2}}{0.4982 ( λ ^{2} - 0.010638 )}

Fit #3— Specimen fit

Shannon / Cauchy

$n$

n

= 1.7680

V_{D}

= 58.9

n^{2} = 1 + \frac{λ ^{2}}{0.4857 ( λ ^{2} - 0.010912 )}

Absorption Specimens

Tanzania, Tanga Region, Umba Valley

Tanzania, Tanga Region, Umba Valley

Tanzania, Tanga Region, Umba Valley