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Petoskey Stone
Petoskey Stone

Ruby
Ruby



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Petoskey Stone
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Ruby

Petoskey Stone and Ruby Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Brittle
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
Not Available3.97-4.05
Amber
1 7.18
1.5 Fracture
Not Available
Conchoidal
1.6 Cleavage
Not Available
No true cleavage
1.7 Mohs Hardness
79
Amber
2 10
1.8 Chemical Composition
Not Available
Al 2 O 3

Petoskey Stone and Ruby Chemical Formula

While comparing Petoskey Stone and Ruby 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 Petoskey Stone and Ruby chemical formula.

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  • Chemical formula of Ruby- Al 2 O 3

Petoskey Stone and Ruby Specific Gravity

Another important criteria for qualitative analysis of gemstones is Petoskey Stone and Ruby Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petoskey Stone and Ruby Optical Properties during the identification of gemstone. Specific gravity of Petoskey Stone is 3.97-4.05 whereas that of Ruby is 3.97-4.05.