Achroite and Riebeckite Physical Properties

Achroite

Riebeckite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

2.90-3.40

Uneven, ConchoidalWalter Schumann

Indiscernible

7-7.5

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Brittle

3.28-3.44

Uneven, Splintery

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

5.0-6.0

Na2Fe2+3Fe3+2Si8O22(OH)2

Achroite and Riebeckite Chemical Formula

While comparing Achroite and Riebeckite 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 Achroite and Riebeckite chemical formula.

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Achroite and Riebeckite Specific Gravity

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