Lapis lazuli and Riebeckite Physical Properties

Lapis lazuli

Riebeckite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.50-3.003.28-3.44

1 7.18

1.5 Fracture

Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)

Uneven, Splintery, Brittle

1.6 Cleavage

3,6

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

1.7 Mohs Hardness

5.55.0-6.0

2 10

1.8 Chemical Composition

The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)₈Al₆Si₆O₂₄(S,SO)₄

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Lapis lazuli and Riebeckite Chemical Formula

While comparing Lapis lazuli 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 Lapis lazuli and Riebeckite chemical formula.

Chemical formula of Lapis lazuli- The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)₈Al₆Si₆O₂₄(S,SO)₄

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Lapis lazuli and Riebeckite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lapis lazuli and Riebeckite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lapis lazuli and Riebeckite Optical Properties during the identification of gemstone. Specific gravity of Lapis lazuli is 3.28-3.44 whereas that of Riebeckite is 3.28-3.44.