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Boulder Opal
Boulder Opal

Phenakite
Phenakite



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Boulder Opal
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Phenakite

Boulder Opal and Phenakite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

-
-

Durability

-
-

Specific Gravity

1.98-2.252.90-2.98
1 7.18
👆🏻

Fracture

Conchoidal
Conchoidal, ConchoidalWalter Schumann

Cleavage

None
Distinct on {11 2 0}, imperfect on {10 1 1}

Mohs Hardness

5-6.57.5-8
2 10
👆🏻

Chemical Composition

SiO 2 + H 2OUlrich Henn and Claudio C.
Be 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Boulder Opal and Phenakite Chemical Formula

While comparing Boulder Opal and Phenakite 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 Phenakite chemical formula.

  • Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
  • Chemical formula of Phenakite- Be 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Boulder Opal and Phenakite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Boulder Opal and Phenakite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Boulder Opal and Phenakite Optical Properties during the identification of gemstone. Specific gravity of Boulder Opal is 2.90-2.98 whereas that of Phenakite is 2.90-2.98.