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Riebeckite
Riebeckite

Agrellite
Agrellite



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Riebeckite
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Agrellite

Riebeckite and Agrellite Physical Properties

Physical Properties

Tenacity

Brittle
-

Solubility

-
-

Durability

-
-

Specific Gravity

3.28-3.442.88
1 7.18
👆🏻

Fracture

Uneven, Splintery
-

Cleavage

Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
perfect [110]

Mohs Hardness

5.0-6.05.5
2 10
👆🏻

Chemical Composition

Na2Fe2+3Fe3+2Si8O22(OH)2
NaCa2Si4O10F

Riebeckite and Agrellite Chemical Formula

While comparing Riebeckite and Agrellite 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 Agrellite chemical formula.

  • Chemical formula of Riebeckite- Na2Fe2+3Fe3+2Si8O22(OH)2
  • Chemical formula of Agrellite- NaCa2Si4O10F

Riebeckite and Agrellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Riebeckite and Agrellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Riebeckite and Agrellite Optical Properties during the identification of gemstone. Specific gravity of Riebeckite is 2.88 whereas that of Agrellite is 2.88.