Spessartine and Alexandrite Physical Properties

Spessartine

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

4.12-4.183.69-3.81

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Conchoidal, Brittle

Not Available

1.6 Cleavage

{???} Distinct

1,1 ; 3,2.

1.7 Mohs Hardness

7-7.58.5

2 10

1.8 Chemical Composition

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

BeAl ₂ O ₄

Spessartine and Alexandrite Chemical Formula

While comparing Spessartine 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 Spessartine and Alexandrite chemical formula.

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

Compare Red Gemstones

Spessartine Vs Tortoiseshell

Spessartine Vs Tourmaline

Spessartine Vs Triplite

Spessartine and Alexandrite Specific Gravity

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