Axinite

Refractive Index: 1.6850
Abbe Number: 60.0
Crystal System: Isotropic (cubic)
Formation: Natural
Dispersion Data: Approximate (from n, V)
Fits: 1

Refraction Fits

Fit #1— Cauchy from (n_D, V_D)

Cauchy approximation

Valid 0.38–0.78 µm

$n$

n

= 1.6850

V_{D}

= 60.0

n (λ) = 1.6678 + 0.005976/ λ^{2}

Borosilicate. GIA dispersion 0.018. Source: GIA / Winchell / Liddicoat gemological tables.

Absorption Specimens

Mexico, Baja California State

Mexico, Baja California State

Mexico, Baja California State (Tecate Municipality), Laguna Hansen (Rosa de Castilla - Olivia Mine)

Sri Lanka, Uva Province (Badulla District), Mahiyangana River