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Herderite and Iolite Physical Properties


Iolite and Herderite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.90-3.02   
2.6-2.7   

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

Cleavage
Indistinct on {110}   
3,1   

Mohs Hardness
5-5.5   
7-7.5   

Chemical Composition
CaBePO 4(F,OH)Ulrich Henn and Claudio C.   
Mg2Al4Si5O18   

Optical Properties >>
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Herderite and Iolite Chemical Formula

While comparing Herderite and Iolite 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 Herderite and Iolite chemical formula.

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Herderite and Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Herderite and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Herderite and Iolite Optical Properties during the identification of gemstone. Specific gravity of Herderite is 2.6-2.7 whereas that of Iolite is 2.6-2.7.

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