Alabaster and Alexandrite Physical Properties

Alabaster

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

3.69-3.81

1.5 Fracture

Not Available

1.6 Cleavage

Not Available

1,1 ; 3,2.

1.7 Mohs Hardness

8.5

1.8 Chemical Composition

CaSO 4 · 2H 2OWalter Schumann , Gemstones of the world (2001)

BeAl ₂ O ₄

Alabaster and Alexandrite Chemical Formula

While comparing Alabaster 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 Alabaster and Alexandrite chemical formula.

Chemical formula of Alabaster- CaSO 4 · 2H 2OWalter Schumann , Gemstones of the world (2001)
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Alabaster and Alexandrite Specific Gravity

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