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Obsidian
Obsidian

Pyrope
Pyrope



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Obsidian
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Pyrope

Obsidian and Pyrope Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.35-2.60
Conchoidal, ConchoidalWalter Schumann
None
5-5.5
SiO2
 
-
insoluble in water
-
3.62-3.87
Conchoidal
None
7-7.5
Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Obsidian and Pyrope Chemical Formula

While comparing Obsidian and Pyrope 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 Obsidian and Pyrope chemical formula.

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Obsidian and Pyrope Specific Gravity

Another important criteria for qualitative analysis of gemstones is Obsidian and Pyrope Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Obsidian Vs Pyrope during the identification of gemstone. Specific gravity of Obsidian is whereas that of Pyrope is .