Starlite and Howlite Physical Properties

Starlite

Howlite

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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

3.91-4.732.45-2.58

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

Not Available

None

1.7 Mohs Hardness

6.5-7.53-3.5

2 10

1.8 Chemical Composition

ZrSiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Starlite and Howlite Chemical Formula

While comparing Starlite 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 Starlite and Howlite chemical formula.

Chemical formula of Starlite- ZrSiO 4Michael 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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Starlite and Howlite Specific Gravity

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