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Plumbogummite
Plumbogummite

Phenakite
Phenakite



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Plumbogummite
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Phenakite

Plumbogummite and Phenakite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

Soluble
-

Durability

-
-

Specific Gravity

4.0142.90-2.98
1 7.18
👆🏻

Fracture

Uneven, Conchoidal
Conchoidal, ConchoidalWalter Schumann

Cleavage

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

Mohs Hardness

4-57.5-8
2 10
👆🏻

Chemical Composition

PbAl3(PO4)(SO4)(OH)6
Be 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Plumbogummite and Phenakite Chemical Formula

While comparing Plumbogummite 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 Plumbogummite and Phenakite chemical formula.

  • Chemical formula of Plumbogummite- PbAl3(PO4)(SO4)(OH)6
  • Chemical formula of Phenakite- Be 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Plumbogummite and Phenakite Specific Gravity

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