Howlite and Anorthite Physical Properties

Howlite

Anorthite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.45-2.582.77

1 7.18

1.5 Fracture

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

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

None

Perfect [001] good [010] poor [110]

1.7 Mohs Hardness

3-3.56-6.5

2 10

1.8 Chemical Composition

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

CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Howlite and Anorthite Chemical Formula

While comparing Howlite and Anorthite 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 Anorthite chemical formula.

Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Anorthite- CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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Howlite and Anorthite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Howlite and Anorthite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Anorthite Optical Properties during the identification of gemstone. Specific gravity of Howlite is 2.77 whereas that of Anorthite is 2.77.