Sunstone and Lapis lazuli Physical Properties

Sunstone

Lapis lazuli

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.62-2.652.50-3.00

1 7.18

1.5 Fracture

Gemstones of the world (2001)

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

1.6 Cleavage

001

3,6

1.7 Mohs Hardness

65.5

2 10

1.8 Chemical Composition

Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈

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

Sunstone and Lapis lazuli Chemical Formula

While comparing Sunstone and Lapis lazuli 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 Sunstone and Lapis lazuli chemical formula.

Chemical formula of Sunstone- Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈
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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Sunstone and Lapis lazuli Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sunstone and Lapis lazuli Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sunstone and Lapis lazuli Optical Properties during the identification of gemstone. Specific gravity of Sunstone is 2.50-3.00 whereas that of Lapis lazuli is 2.50-3.00.