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Melanite and Achroite Physical Properties


Achroite and Melanite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.70-4.10   
2.90-3.40   

Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)   
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)   

Cleavage
Not Available   
Not Available   

Mohs Hardness
6.5-7   
7-7.5   

Chemical Composition
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)   
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.   

Optical Properties >>
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Melanite and Achroite Chemical Formula

While comparing Melanite and Achroite 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 Melanite and Achroite chemical formula.

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Melanite and Achroite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Melanite and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Melanite and Achroite Optical Properties during the identification of gemstone. Specific gravity of Melanite is 2.90-3.40 whereas that of Achroite is 2.90-3.40.

Black Gemstones

Black Gemstones


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