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Riebeckite
Riebeckite

Pollucite
Pollucite



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Riebeckite
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Pollucite

Riebeckite and Pollucite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
Readily soluble in HF

Durability

-
-

Specific Gravity

3.28-3.442.86-2.94
1 7.18
👆🏻

Fracture

Uneven, Splintery
Conchoidal, Uneven

Cleavage

Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
None observed

Mohs Hardness

5.0-6.06.5-7
2 10
👆🏻

Chemical Composition

Na2Fe2+3Fe3+2Si8O22(OH)2
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Riebeckite and Pollucite Chemical Formula

While comparing Riebeckite and Pollucite 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 Riebeckite and Pollucite chemical formula.

  • Chemical formula of Riebeckite- Na2Fe2+3Fe3+2Si8O22(OH)2
  • Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Riebeckite and Pollucite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Riebeckite and Pollucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Riebeckite and Pollucite Optical Properties during the identification of gemstone. Specific gravity of Riebeckite is 2.86-2.94 whereas that of Pollucite is 2.86-2.94.