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Magnesite and Obsidian Physical Properties


Obsidian and Magnesite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Effervesces in hot HCl   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.92-3.12   
2.35-2.60   

Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle   
Conchoidal, ConchoidalWalter Schumann, Conchoidal   

Cleavage
[10 1 1] perfect   
Not Available   

Mohs Hardness
3.5-4.5   
5-5.5   

Chemical Composition
MgCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references   
Not Available   

Optical Properties >>
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Magnesite and Obsidian Chemical Formula

While comparing Magnesite and Obsidian 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 Magnesite and Obsidian chemical formula.

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Magnesite and Obsidian Specific Gravity

Another important criteria for qualitative analysis of gemstones is Magnesite and Obsidian Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Magnesite and Obsidian Optical Properties during the identification of gemstone. Specific gravity of Magnesite is 2.35-2.60 whereas that of Obsidian is 2.35-2.60.

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