Aquamarine is the blue to the variety that is blue-green of Beryl, a Beryllium Aluminum Silicate with the general chemical formula Be3Al2(Si16O18). The
crystall cells of Aquamarine and all Beryls, are regular hexagonal rings located one above the other, forming
hollow channels. Aquamarine retained the name given by Pliny the Elder, who noted that the most valuable of Beryls are
those, whose color resembles the pure green of sea waters (from Latin aqua - water, mare - sea).
Aquamarine ranges in color from a faint light blue to blue and
bluish-green, with lighter colored stones being the more common type. Light
green Beryl can be transformed into Aquamarine if heated to 750ยบ F (400ยบ C). The green hues in most Aquamarine can also
be removed through heat treatment. Aquamarine gets its blue-green colour from traces of ferrous iron added to the Beryl
that is a basic formula.
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