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Riebeckite
Riebeckite

Antigorite
Antigorite



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Riebeckite
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Antigorite

Riebeckite and Antigorite Physical Properties

Physical Properties

Tenacity

Brittle
-

Solubility

-
-

Durability

-
-

Specific Gravity

3.28-3.442.58-2.80
1 7.18
👆🏻

Fracture

Uneven, Splintery
Conchoidal

Cleavage

Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
{001} Good

Mohs Hardness

5.0-6.05-5.5
2 10
👆🏻

Chemical Composition

Na2Fe2+3Fe3+2Si8O22(OH)2
(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)

Riebeckite and Antigorite Chemical Formula

While comparing Riebeckite and Antigorite 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 Antigorite chemical formula.

  • Chemical formula of Riebeckite- Na2Fe2+3Fe3+2Si8O22(OH)2
  • Chemical formula of Antigorite- (Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)

Riebeckite and Antigorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Riebeckite and Antigorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Riebeckite and Antigorite Optical Properties during the identification of gemstone. Specific gravity of Riebeckite is 2.58-2.80 whereas that of Antigorite is 2.58-2.80.