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Hematite
Hematite

Boulder Opal
Boulder Opal



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Hematite
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Boulder Opal

Hematite and Boulder Opal Physical Properties

Physical Properties

Tenacity

Brittle
-

Solubility

-
-

Durability

-
-

Specific Gravity

5.00-5.301.98-2.25
1 7.18
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Fracture

Uneven, ConchoidalWalter Schumann, Conchoidal
Conchoidal

Cleavage

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

Mohs Hardness

65-6.5
2 10
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Chemical Composition

Fe 2O 3Arthur Thomas , Gemstones (2009)
SiO 2 + H 2OUlrich Henn and Claudio C.

Hematite and Boulder Opal Chemical Formula

While comparing Hematite 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 Hematite and Boulder Opal chemical formula.

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

Hematite and Boulder Opal Specific Gravity

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