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Obsidian
Obsidian

Grandidierite
Grandidierite



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Obsidian
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Grandidierite

Obsidian and Grandidierite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.35-2.602.85-3.00
Amber
1 7.18
1.5 Fracture
Conchoidal, ConchoidalWalter Schumann, Conchoidal
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven
1.6 Cleavage
Not Available
Perfect
1.7 Mohs Hardness
5-5.57.5
Amber
2 10
1.8 Chemical Composition
Not Available
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.

Obsidian and Grandidierite Chemical Formula

While comparing Obsidian and Grandidierite 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 Grandidierite chemical formula.

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  • Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.

Obsidian and Grandidierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Obsidian and Grandidierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Obsidian and Grandidierite Optical Properties during the identification of gemstone. Specific gravity of Obsidian is 2.85-3.00 whereas that of Grandidierite is 2.85-3.00.