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Staurolite and Ludlamite Physical Properties


Ludlamite and Staurolite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.7-3.8   
3.1-3.2   

Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle   
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)   

Cleavage
Distinct on {010}   
Vitreous, pearly on cleavage   

Mohs Hardness
7-7.5   
3-4   

Chemical Composition
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.   
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references   

Optical Properties >>
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Staurolite and Ludlamite Chemical Formula

While comparing Staurolite 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 Staurolite and Ludlamite chemical formula.

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Staurolite and Ludlamite Specific Gravity

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

Brown Gemstones

Brown Gemstones


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