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Boulder Opal
Boulder Opal

Aragonite
Aragonite



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Boulder Opal
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Aragonite

Boulder Opal and Aragonite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

-
Dilute acid

Durability

-
-

Specific Gravity

1.98-2.252.93-2.96
1 7.18
👆🏻

Fracture

Conchoidal
Subconchoidal, Conchoidal

Cleavage

None
Distinct on {010}, imperfect {110} and {011}

Mohs Hardness

5-6.53.5-4
2 10
👆🏻

Chemical Composition

SiO 2 + H 2OUlrich Henn and Claudio C.
CaCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Boulder Opal and Aragonite Chemical Formula

While comparing Boulder Opal and Aragonite 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 Aragonite chemical formula.

  • Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
  • Chemical formula of Aragonite- CaCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Boulder Opal and Aragonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Boulder Opal and Aragonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Boulder Opal and Aragonite Optical Properties during the identification of gemstone. Specific gravity of Boulder Opal is 2.93-2.96 whereas that of Aragonite is 2.93-2.96.