Composition: Be3Al2(SiO3)6
crystal System: Hexagonal
Habit: Prismatic
Refractive Index: 1.56-1.59
Double Refraction and Optic Sign: 0.005-0.008 negative
Dispersion: Low (0.014)
Specific Gravity: 2.7-2.8
Hardness: 7.5-8.0
Cleavage: Poor (basal)
Fracture: Concohoidal to Uneven
Lustre: Vitreous
Pleochroism: Weak bands in the blue 456nm and violet 427nm, green aqua's have a band at 537nm due to the extraordinary ray
Absorption Spectrum:
Inclusions: Two phase inclusions, rain and mica, most stones are free from inclusions
Occurrence: Brazil, Mayanmar (Burma), Malagasy Republic, Namibia, Nigeria, USA, USSR

Aquamarine

Because of it's colour, Aquamarine was once reffered to as "The Sailor's Stone" and was said to protect seafarers.  Ancient Hindu mystics believed that Aquamarine promoted mental clarity. Medievals credited it with giving the wearer insight and foresight. Today, some people believe the stone gives them inspiration and inner peace, and enhances communication skills.

John Cadby Jewellers
 Goldsmith, Silversmith,
Diamond Merchants, Appraiser & Engraver.
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3, White Hart Yard, Trowbridge, Wiltshire.  BA14 8BY
Tel: 01225 776322  E-Mail: John@Cadby.co.uk
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