Riebeckite and Alabaster Physical Properties

Riebeckite

Alabaster

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.28-3.442.30

1 7.18

1.5 Fracture

Uneven, Splintery, Brittle

Not Available

1.6 Cleavage

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

Not Available

1.7 Mohs Hardness

5.0-6.02

2 10

1.8 Chemical Composition

Not Available

CaSO 4 · 2H 2OWalter Schumann , Gemstones of the world (2001)

Riebeckite and Alabaster Chemical Formula

While comparing Riebeckite and Alabaster 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 Alabaster chemical formula.

Chemical formula of Alabaster- CaSO 4 · 2H 2OWalter Schumann , Gemstones of the world (2001)

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Riebeckite and Alabaster Specific Gravity

Another important criteria for qualitative analysis of gemstones is Riebeckite and Alabaster Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Riebeckite and Alabaster Optical Properties during the identification of gemstone. Specific gravity of Riebeckite is 2.30 whereas that of Alabaster is 2.30.