As early as the Middle Ages, colorless beryls were beaten and polished in such a way that they could serve as “magnifying glasses”. In a time when paper was scarce and letters were closely written, this was necessary.
Aquamarine means “sea water colored”.
The interesting thing is that the blue beryls worth grinding occur in pegmatites. The deposits are steadily dwindling, even from the main supplier country Brazil the raw material is scarce and prices are rising. There is also less and less material in good qualities from Mozambique and Nigeria.