Agrellite and Howlite Physical Properties

Agrellite

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

2.882.45-2.58

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

perfect [110]

None

1.7 Mohs Hardness

5.53-3.5

2 10

1.8 Chemical Composition

NaCa2Si4O10F

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

Agrellite and Howlite Chemical Formula

While comparing Agrellite 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 Agrellite and Howlite chemical formula.

Chemical formula of Agrellite- NaCa2Si4O10F
Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Agrellite and Howlite Specific Gravity

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