Sapphirine

Refractive Index
1.7200
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

= 1.7200 = 60.0
n4004505005506006507007501.7101.7201.7301.7401.750

Mg-Al silicate (unrelated to sapphire). GIA dispersion 0.017. Source: GIA / Winchell / Liddicoat gemological tables.

Absorption Specimens

LED
SUN
I
F
 
Sapphirine
Sri Lanka