Apophyllite KF and Howlite Physical Properties

Apophyllite KF

Howlite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.33-2.372.45-2.58

1 7.18

1.5 Fracture

Uneven, Brittle, Uneven, Brittle, Uneven

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

1.6 Cleavage

Perfect on {001}, imperfect on {110}

None

1.7 Mohs Hardness

4.5-53-3.5

2 10

1.8 Chemical Composition

(K,Na)Ca4Si8O20(F,OH)•8(H2O)

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

Apophyllite KF and Howlite Chemical Formula

While comparing Apophyllite KF 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 Apophyllite KF and Howlite chemical formula.

Chemical formula of Apophyllite KF- (K,Na)Ca4Si8O20(F,OH)•8(H2O)
Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Green Gemstones

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Apophyllite KF Vs Langbeinite

Apophyllite KF Vs Hauyne

Apophyllite KF and Howlite Specific Gravity

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