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Topaz
Topaz

Howlite
Howlite



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Topaz
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Howlite

Topaz and Howlite 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
3.49-3.572.45-2.58
Amber
1 7.18
1.5 Fracture
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.6 Cleavage
[001] Perfect
None
1.7 Mohs Hardness
83-3.5
Amber
2 10
1.8 Chemical Composition
Al2SiO4(F,OH)2
Ca 2B 5SiO 9(OH) 5Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Topaz and Howlite Chemical Formula

While comparing Topaz and Howlite 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 Topaz and Howlite chemical formula.

  • Chemical formula of Topaz- Al2SiO4(F,OH)2
  • Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Topaz and Howlite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Howlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Howlite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 2.45-2.58 whereas that of Howlite is 2.45-2.58.