Dumortierite and Boulder Opal Physical Properties

Dumortierite

Boulder Opal

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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

3.26-3.411.98-2.25

1 7.18

1.5 Fracture

Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

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

1.6 Cleavage

Distinct on {100}, poor on {110}; parting on {001}

Not Available

1.7 Mohs Hardness

7-8.55-6.5

2 10

1.8 Chemical Composition

AlAl₆O₃BSi₃O₁₈

SiO 2 + H 2OUlrich Henn and Claudio C.

Dumortierite and Boulder Opal Chemical Formula

While comparing Dumortierite and Boulder Opal 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 Dumortierite and Boulder Opal chemical formula.

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈
Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Dumortierite and Boulder Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dumortierite and Boulder Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Boulder Opal Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 1.98-2.25 whereas that of Boulder Opal is 1.98-2.25.