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Aquamarine

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The name of the mineral derives from Latin 'aqua marina' meaning sea water and refers to the blue-greenish color of the stone. Aquamarine is a variety of beryl, just like emerald and heliodor. Its pale blue color is attributed to Fe2+. The stone is valued not only for its color and transparency, but also for its hardness.

 
Aquamarine

Basic properties

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Composition Be3Al2Si6O18
Class Silicates
Crystal system Hexagonal
Mohs' hardness 7,5-8
Fracture Conchoidal
Cleavage Imperfect
Lustre Glassy
Streak White
Localities Brazil, Madagascar, Pakistan, Afghanistan, Australia, India, Sri Lanka, USA