Forsterite

Peridot

Refractive Index: 1.7237
Abbe Number: 44.4
Crystal System: Isotropic (cubic)
Formation: Natural
Dispersion Data: Measured (published fit)
Fits: 1

Refraction Fits

Fit #1

Shannon / Cauchy

$n$

n

= 1.7237

V_{D}

= 44.4

n^{2} = 1 + \frac{λ ^{2}}{0.5289 ( λ ^{2} - 0.01418 )}

Absorption Specimens

Egypt, Zabargad Island

Egypt, Zabargad Island

Myanmar, Mandalay Division, Mogok (Kyaukpon)

United States, Arizona (Gila County), San Carlos