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Phlogopite
Phlogopite

Howlite
Howlite



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Phlogopite
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Howlite

Phlogopite and Howlite Physical Properties

1 Physical Properties
1.1 Tenacity
Tough
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.78-2.852.45-2.58
Amber
1 7.18
1.5 Fracture
None, Uneven
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.6 Cleavage
Perfect basal (001)
None
1.7 Mohs Hardness
2-2.53-3.5
Amber
2 10
1.8 Chemical Composition
Not Available
Ca 2B 5SiO 9(OH) 5Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Phlogopite and Howlite Chemical Formula

While comparing Phlogopite 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 Phlogopite and Howlite chemical formula.

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

Phlogopite and Howlite Specific Gravity

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