Diaspore and Howlite Physical Properties

Diaspore

Howlite

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1 Physical Properties

1.1 Tenacity

Very brittle

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.30-3.402.45-2.58

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal

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

1.6 Cleavage

{010} perfect, {110} distinct, {100} in traces

None

1.7 Mohs Hardness

6.5-73-3.5

2 10

1.8 Chemical Composition

AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

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

Diaspore and Howlite Chemical Formula

While comparing Diaspore 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 Diaspore and Howlite chemical formula.

Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Diaspore and Howlite Specific Gravity

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