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Apophyllite KF and Ludlamite Physical Properties


Ludlamite and Apophyllite KF Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.33-2.37   
3.1-3.2   

Fracture
Uneven, Brittle, Uneven, Brittle, Uneven   
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)   

Cleavage
Perfect on {001}, imperfect on {110}   
Vitreous, pearly on cleavage   

Mohs Hardness
4.5-5   
3-4   

Chemical Composition
(K,Na)Ca4Si8O20(F,OH)•8(H2O)   
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references   

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Apophyllite KF and Ludlamite Chemical Formula

While comparing Apophyllite KF and Ludlamite 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 Apophyllite KF and Ludlamite chemical formula.

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Apophyllite KF and Ludlamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apophyllite KF and Ludlamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apophyllite KF and Ludlamite Optical Properties during the identification of gemstone. Specific gravity of Apophyllite KF is 3.1-3.2 whereas that of Ludlamite is 3.1-3.2.

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