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Aquamarine
Aquamarine is a hexagonal mineral, beryllium silicate (chemical formula Be3Al2Si6O18). The name of the mineral is derived from the Latin aa marina (sea water).
Like the sea level, aquamarine can have different shades of blue, from light tones to green tones to dark blue. The louder the blue tone, the higher the aquamarine value. Most aquamarines, however, have the characteristic light blue color, which is paradoxically the most sought after in the jewelery industry.
Identification:
Color blue
Crystal appearance prismatic
The system is hexagonal
Hardness 7.5 - 8
Glass glossy, matt
The cleavage is imperfect
Scratch white
Density 2.6 - 2.8 g / cm³