Nosean and Alexandrite Physical Properties

Nosean

Alexandrite

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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

2.30-2.40

3.69-3.81

1.5 Fracture

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

Not Available

1.6 Cleavage

{110} Perfect

1,1 ; 3,2.

1.7 Mohs Hardness

Not Available

8.5

1.8 Chemical Composition

Na 8Al 6Si 6O 24(SO 4) · H 2OAnthony et al , Handbook of Mineralogy (2001)

BeAl ₂ O ₄

Nosean and Alexandrite Chemical Formula

While comparing Nosean and Alexandrite 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 Nosean and Alexandrite chemical formula.

Chemical formula of Nosean- Na 8Al 6Si 6O 24(SO 4) · H 2OAnthony et al , Handbook of Mineralogy (2001)
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Nosean and Alexandrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Nosean and Alexandrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nosean and Alexandrite Optical Properties during the identification of gemstone. Specific gravity of Nosean is 3.69-3.81 whereas that of Alexandrite is 3.69-3.81.