Jadeite

Refractive Index: 1.6660
Abbe Number: 87.0
Crystal System: Isotropic (cubic)
Formation: Natural
Dispersion Data: Approximate (from n, V)
Fits: 1

Refraction Fits

Fit #1— Cauchy from (n_D, V_D) — isotropic approximation of biaxial species

Cauchy approximation

Valid 0.38–0.78 µm

$n$

n

= 1.6660

V_{D}

= 87.0

n (λ) = 1.6545 + 0.004007/ λ^{2}

Dispersion 0.013 from GIA tables; n_D 1.666 (n_α ≈ 1.654, n_γ ≈ 1.667). No published Sellmeier.

Absorption Specimens

Myanmar, Kachin State (Mohnyin District), Hpakant-Tawmaw