Uvite and Howlite Physical Properties

Uvite

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

2.97-3.142.45-2.58

1 7.18

1.5 Fracture

Uneven, Conchoidal, Brittle

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

1.6 Cleavage

{1011} Indistinct

None

1.7 Mohs Hardness

Not Available3-3.5

2 10

1.8 Chemical Composition

Ca(Mg 3)MgAl 5(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

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

Uvite and Howlite Chemical Formula

While comparing Uvite 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 Uvite and Howlite chemical formula.

Chemical formula of Uvite- Ca(Mg 3)MgAl 5(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Uvite and Howlite Specific Gravity

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