Rhodochrosite

Refractive Index: 1.7500
Abbe Number: 35.0
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

= 1.7500

V_{D}

= 35.0

n (λ) = 1.7177 + 0.011217/ λ^{2}

Mn carbonate; popular pink gem. GIA dispersion 0.040. Source: GIA / Winchell / Liddicoat gemological tables.

Absorption Specimens

South Africa, Northern Cape Province, Hotazel

South Africa, Northern Cape Province, Hotazel

South Africa, Northern Cape Province, Hotazel

United States, Colorado (Park County), Alma (Sweet Home Mine)

United States, Colorado (Park County), Mount Bross (Sweet Home Mine)

United States, Colorado (Park County), Mount Bross (Sweet Home Mine)