Grossular and Alexandrite Physical Properties

Grossular

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

3.55-3.733.69-3.81

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

Not Available

1.6 Cleavage

none

1,1 ; 3,2.

1.7 Mohs Hardness

7-7.58.5

2 10

1.8 Chemical Composition

Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

BeAl ₂ O ₄

Grossular and Alexandrite Chemical Formula

While comparing Grossular 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 Grossular and Alexandrite chemical formula.

Chemical formula of Grossular- Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Grossular and Alexandrite Specific Gravity

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