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Howlite
Howlite

Moldavite
Moldavite



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Howlite
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Moldavite

Howlite and Moldavite Physical Properties

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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
2.45-2.582.32-2.38
Amber
1 7.18
1.5 Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)
1.6 Cleavage
None
Not Available
1.7 Mohs Hardness
3-3.55.5
Amber
2 10
1.8 Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
SiO 2(+Al 2O 3)Walter Schumann , Gemstones of the world (2001)

Howlite and Moldavite Chemical Formula

While comparing Howlite and Moldavite 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 Moldavite 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 Moldavite- SiO 2(+Al 2O 3)Walter Schumann , Gemstones of the world (2001)

Howlite and Moldavite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Howlite and Moldavite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Moldavite Optical Properties during the identification of gemstone. Specific gravity of Howlite is 2.32-2.38 whereas that of Moldavite is 2.32-2.38.