Howlite and Tourmaline Physical Properties

Howlite

Tourmaline

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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

2.45-2.582.85-3.35

1 7.18

1.5 Fracture

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

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

None

Indistinct

1.7 Mohs Hardness

3-3.57-7.5

2 10

1.8 Chemical Composition

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

Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.

Howlite and Tourmaline Chemical Formula

While comparing Howlite and Tourmaline 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 Tourmaline chemical formula.

Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Tourmaline- Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.

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Howlite and Tourmaline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Howlite and Tourmaline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Tourmaline Optical Properties during the identification of gemstone. Specific gravity of Howlite is 2.85-3.35 whereas that of Tourmaline is 2.85-3.35.