Howlite and Mellite Physical Properties

Howlite

Mellite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.45-2.581.58-1.60

1 7.18

1.5 Fracture

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

ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

1.6 Cleavage

None

{011} Imperfect

1.7 Mohs Hardness

3-3.52

2 10

1.8 Chemical Composition

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

Al 2(Cl 2O 12) · 18H 2OUlrich Henn and Claudio C.

Howlite and Mellite Chemical Formula

While comparing Howlite and Mellite 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 Mellite chemical formula.

Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Mellite- Al 2(Cl 2O 12) · 18H 2OUlrich Henn and Claudio C.

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Howlite and Mellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Howlite and Mellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Mellite Optical Properties during the identification of gemstone. Specific gravity of Howlite is 1.58-1.60 whereas that of Mellite is 1.58-1.60.