Boulder Opal and Hematite Physical Properties

Boulder Opal

Hematite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.255.00-5.30

1 7.18

1.5 Fracture

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

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

1.6 Cleavage

Not Available

None, may show partings on {0001} and {10 1 1}

1.7 Mohs Hardness

5-6.56

2 10

1.8 Chemical Composition

SiO 2 + H 2OUlrich Henn and Claudio C.

Fe 2O 3Arthur Thomas , Gemstones (2009)

Boulder Opal and Hematite Chemical Formula

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

Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Chemical formula of Hematite- Fe 2O 3Arthur Thomas , Gemstones (2009)

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Boulder Opal Vs Chrome Tourmaline

Boulder Opal and Hematite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Boulder Opal and Hematite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Boulder Opal and Hematite Optical Properties during the identification of gemstone. Specific gravity of Boulder Opal is 5.00-5.30 whereas that of Hematite is 5.00-5.30.