Beryl

Aquamarine

Refractive Index: 1.5738
Abbe Number: 68.4
Crystal System: Isotropic (cubic)
Formation: Natural
Dispersion Data: Measured (published fit)
Fits: 1

Refraction Fits

Fit #1

Shannon / Cauchy

$n$

n

= 1.5738

V_{D}

= 68.4

n^{2} = 1 + \frac{λ ^{2}}{0.6952 ( λ ^{2} - 0.009062 )}

Absorption Specimens

Brazil, Minas Gerais State, Santa Maria do Suaçui

Kenya, Eastern Province, Kioo Hill

Madagascar, Antananarivo Province (Vakinankaratra District), Mahaiza (Itongafeno)

Mozambique, Zambezia Province, Mocuba

Myanmar, Mandalay Division, Mogok (Kyatpyin)

Namibia, Erongo Region (Karibib District), Swakopmund

Zimbabwe, Mashonaland West Province (Karoi District), Mwami (St. Anne's Mine)