Moissanite and Alexandrite Physical Properties

Moissanite

Alexandrite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

none

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.17-3.24

3.69-3.81

1.5 Fracture

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

Not Available

1.6 Cleavage

(0001) indistinct

1,1 ; 3,2.

1.7 Mohs Hardness

9-9.5

8.5

1.8 Chemical Composition

SiCArthur Thomas , Gemstones (2009)

BeAl ₂ O ₄

Moissanite and Alexandrite Chemical Formula

While comparing Moissanite 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 Moissanite and Alexandrite chemical formula.

Chemical formula of Moissanite- SiCArthur Thomas , Gemstones (2009)
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Moissanite and Alexandrite Specific Gravity

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