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Alexandrite and Herderite Physical Properties


Herderite and Alexandrite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.69-3.81   
2.90-3.02   

Fracture
Not Available   
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle   

Cleavage
1,1 ; 3,2.   
Indistinct on {110}   

Mohs Hardness
8.5   
5-5.5   

Chemical Composition
BeAl 2 O 4   
CaBePO 4(F,OH)Ulrich Henn and Claudio C.   

Optical Properties >>
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Alexandrite and Herderite Chemical Formula

While comparing Alexandrite and Herderite 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 Alexandrite and Herderite chemical formula.

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Alexandrite and Herderite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Herderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Herderite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 2.90-3.02 whereas that of Herderite is 2.90-3.02.

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