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Howlite
Howlite

Ruby
Ruby



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Howlite
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Ruby

Howlite and Ruby Physical Properties

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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
2.45-2.583.97-4.05
Amber
1 7.18
1.5 Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Conchoidal
1.6 Cleavage
None
No true cleavage
1.7 Mohs Hardness
3-3.59
Amber
2 10
1.8 Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
Al 2 O 3

Howlite and Ruby Chemical Formula

While comparing Howlite 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 Howlite and Ruby chemical formula.

  • Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Ruby- Al 2 O 3

Howlite and Ruby Specific Gravity

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