Lapis lazuli and Prehnite Physical Properties

Lapis lazuli

Prehnite

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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

2.50-3.002.80-2.95

1 7.18

1.5 Fracture

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

Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic

1.6 Cleavage

3,6

Distinct on [001]

1.7 Mohs Hardness

5.56-6.5

2 10

1.8 Chemical Composition

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

Ca₂Al₂Si₃O₁₂(OH)

Lapis lazuli and Prehnite Chemical Formula

While comparing Lapis lazuli and Prehnite 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 Prehnite 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
Chemical formula of Prehnite- Ca₂Al₂Si₃O₁₂(OH)

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Lapis lazuli and Prehnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lapis lazuli and Prehnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lapis lazuli and Prehnite Optical Properties during the identification of gemstone. Specific gravity of Lapis lazuli is 2.80-2.95 whereas that of Prehnite is 2.80-2.95.