Bytownite and Howlite Physical Properties

Bytownite

Howlite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.72-2.752.45-2.58

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Sixth Edition (2006)

UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

Perfect on [001], good on [010], imperfect on [110]

None

1.7 Mohs Hardness

6-6.53-3.5

2 10

1.8 Chemical Composition

Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Bytownite and Howlite Chemical Formula

While comparing Bytownite 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 Bytownite and Howlite chemical formula.

Chemical formula of Bytownite- Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Bytownite and Howlite Specific Gravity

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