Howlite and Gyrolite Physical Properties

Howlite

Gyrolite

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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

2.45-2.582.48

1 7.18

1.5 Fracture

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

Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

None

Perfect on {001}

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

NaCa16Si23AlO60(OH)8•64(H2O)

Howlite and Gyrolite Chemical Formula

While comparing Howlite and Gyrolite 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 Gyrolite chemical formula.

Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Gyrolite- NaCa16Si23AlO60(OH)8•64(H2O)

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Howlite and Gyrolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Howlite and Gyrolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Gyrolite Optical Properties during the identification of gemstone. Specific gravity of Howlite is 2.48 whereas that of Gyrolite is 2.48.