Demantoid and Lapis lazuli Physical Properties

Demantoid

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

3.77-3.952.50-3.00

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Not Available

3,6

1.7 Mohs Hardness

6.55.5

2 10

1.8 Chemical Composition

Ca 3Fe 2(SiO 4) 3Ulrich Henn and Claudio C.

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

Demantoid and Lapis lazuli Chemical Formula

While comparing Demantoid 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 Demantoid and Lapis lazuli chemical formula.

Chemical formula of Demantoid- Ca 3Fe 2(SiO 4) 3Ulrich Henn and Claudio C.
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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Demantoid and Lapis lazuli Specific Gravity

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