The Indian tradition mentions a mountain of sacred origin "Rahun" from whose top the precious stones brought by the winds and streams and then collected by men, the aquamarines, descended to the valley.

The shining alone created sparkling reflections all around the stones called "glows of Rahun". The aquamarines had the ability to strengthen sight and to give generosity and chastity. In the modern era, the center of diffusion of aquamarines has moved to the other hemisphere: those of the legendary mines of Minas Gerais in Brazil are famous and are still very active. Here was extracted a crystal of exceptional dimensions kept at the Museum of Natural History in New York. Other deposits are found in India and in the south-central African region. The characteristics of the aquamarine crystal to stand out require a rigorous cut and attentive to the angles.

Historical background: aquamarine is a variety of beryl. Its name derives from the fact that its color recalls that of the sea water.

Chemical composition: Be3Al2Si6O18

Specific weight: 2.68-2.80
Refractive index: ne = 1.570-1.580 nw = 1.575-1.586 (birefringence 0.004-0.010)