Achroite and Aquamarine Physical Properties

Achroite

Aquamarine

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.402.66-2.80

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

Not Available

1.6 Cleavage

Not Available

3,1 basal

1.7 Mohs Hardness

7-7.57.5-8

2 10

1.8 Chemical Composition

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Be₃Al₂SiO₆

Achroite and Aquamarine Chemical Formula

While comparing Achroite and Aquamarine physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Achroite and Aquamarine chemical formula.

Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Chemical formula of Aquamarine- Be₃Al₂SiO₆

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Achroite and Aquamarine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Achroite and Aquamarine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Aquamarine Optical Properties during the identification of gemstone. Specific gravity of Achroite is 2.66-2.80 whereas that of Aquamarine is 2.66-2.80.