Garnet

Pyrope-Almandine

Refractive Index: 1.7550
Abbe Number: 28.0
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

= 1.7550

V_{D}

= 28.0

n (λ) = 1.7143 + 0.014115/ λ^{2}

Intermediate Pyrope-Almandine solid solution. GIA dispersion 0.027. Source: GIA / Winchell / Liddicoat gemological tables.

Absorption Specimens

Pyrope-Almandine

Pyrope-Almandine

Myanmar, Mandalay Division, Mogok

Pyrope-Almandine

Sri Lanka, Central Province, Elahera

Pyrope-Almandine

Sri Lanka, Central Province, Elahera

Pyrope-Almandine

Sri Lanka, Sabaragamuwa Province, Eheliyagoda

Pyrope-Almandine

Tanzania, Tanga Region, Umba Valley

Pyrope-Almandine

United States, North Carolina